diff --git a/yarn.lock b/yarn.lock
index 88b1b54..01c1415 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2584,7 +2584,7 @@ commander@2.17.x:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.17.1.tgz#bd77ab7de6de94205ceacc72f1716d29f20a77bf"
   integrity sha512-wPMUt6FnH2yzG95SA6mzjQOEKUU3aLaDEmzs1ti+1E9h+CsrZghRlqEM/EJ4KscsQVG8uNN4uVreUeT8+drlgg==
 
-commander@^2.11.0, commander@^2.19.0, commander@~2.20.0:
+commander@^2.11.0, commander@^2.19.0:
   version "2.20.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
@@ -2594,6 +2594,11 @@ commander@~2.19.0:
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.19.0.tgz#f6198aa84e5b83c46054b94ddedbfed5ee9ff12a"
   integrity sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==
 
+commander@~2.20.3:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
+
 common-tags@^1.8.0:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/common-tags/-/common-tags-1.8.0.tgz#8e3153e542d4a39e9b10554434afaaf98956a937"
@@ -2644,6 +2649,21 @@ concat-stream@^1.5.0:
     readable-stream "^2.2.2"
     typedarray "^0.0.6"
 
+concurrently@^4.1.1:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-4.1.2.tgz#1a683b2b5c41e9ed324c9002b9f6e4c6e1f3b6d7"
+  integrity sha512-Kim9SFrNr2jd8/0yNYqDTFALzUX1tvimmwFWxmp/D4mRI+kbqIIwE2RkBDrxS2ic25O1UgQMI5AtBqdtX3ynYg==
+  dependencies:
+    chalk "^2.4.2"
+    date-fns "^1.30.1"
+    lodash "^4.17.15"
+    read-pkg "^4.0.1"
+    rxjs "^6.5.2"
+    spawn-command "^0.0.2-1"
+    supports-color "^4.5.0"
+    tree-kill "^1.2.1"
+    yargs "^12.0.5"
+
 confusing-browser-globals@^1.0.7:
   version "1.0.7"
   resolved "https://registry.yarnpkg.com/confusing-browser-globals/-/confusing-browser-globals-1.0.7.tgz#5ae852bd541a910e7ffb2dbb864a2d21a36ad29b"
@@ -3070,6 +3090,11 @@ data-urls@^1.0.0, data-urls@^1.1.0:
     whatwg-mimetype "^2.2.0"
     whatwg-url "^7.0.0"
 
+date-fns@^1.30.1:
+  version "1.30.1"
+  resolved "https://registry.yarnpkg.com/date-fns/-/date-fns-1.30.1.tgz#2e71bf0b119153dbb4cc4e88d9ea5acfb50dc05c"
+  integrity sha512-hBSVCvSmWC+QypYObzwGOd9wqdDpOt+0wl0KbU+R+uuZBS1jN8VsD1ss3irQDknRj5NvxiTF6oj/nDRnN/UQNw==
+
 date-now@^0.1.4:
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/date-now/-/date-now-0.1.4.tgz#eaf439fd4d4848ad74e5cc7dbef200672b9e345b"
@@ -4324,9 +4349,9 @@ handle-thing@^2.0.0:
   integrity sha512-d4sze1JNC454Wdo2fkuyzCr6aHcbL6PGGuFAz0Li/NcOm1tCHGnWDRmJP85dh9IhQErTc2svWFEX5xHIOo//kQ==
 
 handlebars@^4.1.2:
-  version "4.1.2"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.1.2.tgz#b6b37c1ced0306b221e094fc7aca3ec23b131b67"
-  integrity sha512-nvfrjqvt9xQ8Z/w0ijewdD/vvWDTOweBUm96NTr66Wfvo1mJenBLwcYmPs3TIBP5ruzYGD7Hx/DaM9RmhroGPw==
+  version "4.5.3"
+  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.5.3.tgz#5cf75bd8714f7605713511a56be7c349becb0482"
+  integrity sha512-3yPecJoJHK/4c6aZhSvxOyG4vJKDshV36VHp0iVCDVh7o9w2vwi3NSnL2MMPj3YdduqaBcu7cGbggJQM0br9xA==
   dependencies:
     neo-async "^2.6.0"
     optimist "^0.6.1"
@@ -4359,6 +4384,11 @@ has-ansi@^2.0.0:
   dependencies:
     ansi-regex "^2.0.0"
 
+has-flag@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-2.0.0.tgz#e8207af1cc7b30d446cc70b734b5e8be18f88d51"
+  integrity sha1-6CB68cx7MNRGzHC3NLXovhj4jVE=
+
 has-flag@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
@@ -5913,6 +5943,11 @@ lodash.uniq@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.11.tgz#b39ea6229ef607ecd89e2c8df12536891cac9b8d"
   integrity sha512-cQKh8igo5QUhZ7lg38DYWAxMvjSAKG0A8wGSVimP07SIUEK2UO+arSRKbRZWtelMtN5V0Hkwh5ryOto/SshYIg==
 
+lodash@^4.17.15:
+  version "4.17.15"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
+  integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
+
 loglevel@^1.4.1:
   version "1.6.1"
   resolved "https://registry.yarnpkg.com/loglevel/-/loglevel-1.6.1.tgz#e0fc95133b6ef276cdc8887cdaf24aa6f156f8fa"
@@ -6202,6 +6237,23 @@ mkdirp@0.5.1, mkdirp@0.5.x, mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.0, mkdirp@
   dependencies:
     minimist "0.0.8"
 
+mobx-react-lite@^1.4.2:
+  version "1.5.2"
+  resolved "https://registry.yarnpkg.com/mobx-react-lite/-/mobx-react-lite-1.5.2.tgz#c4395b0568b9cb16f07669d8869cc4efa1b8656d"
+  integrity sha512-PyZmARqqWtpuQaAoHF5pKX7h6TKNLwq6vtovm4zZvG6sEbMRHHSqioGXSeQbpRmG8Kw8uln3q/W1yMO5IfL5Sg==
+
+mobx-react@^6.1.1:
+  version "6.1.4"
+  resolved "https://registry.yarnpkg.com/mobx-react/-/mobx-react-6.1.4.tgz#818e7991c321c05bd9b8156d94be17dad165501e"
+  integrity sha512-wzrJF1RflhyLh8ne4FJfMbG8ZgRFmZ62b4nbyhJzwQpAmrkSnSsAWG9mIff4ffV/Q7OU+uOYf7rXvSmiuUe4cw==
+  dependencies:
+    mobx-react-lite "^1.4.2"
+
+mobx@^4.13.0:
+  version "4.15.1"
+  resolved "https://registry.yarnpkg.com/mobx/-/mobx-4.15.1.tgz#492cba4c64682f6ea4e24d2d5e3c32e7b9ae1c12"
+  integrity sha512-WVRLD/OmEM0fLVPDfdNih4kY+a/ZuP//eK92yqH7uRb2e6H998qf8QqHn90LDc0aXsjcJnqHJ81oVZ+e18jskA==
+
 move-concurrently@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/move-concurrently/-/move-concurrently-1.0.1.tgz#be2c005fda32e0b29af1f05d7c4b33214c701f92"
@@ -6284,9 +6336,9 @@ negotiator@0.6.2:
   integrity sha512-hZXc7K2e+PgeI1eDBe/10Ard4ekbfrrqG8Ep+8Jmf4JID2bNg7NvCPOZN+kfF574pFQI7mum2AUqDidoKqcTOw==
 
 neo-async@^2.5.0, neo-async@^2.6.0:
-  version "2.6.0"
-  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.0.tgz#b9d15e4d71c6762908654b5183ed38b753340835"
-  integrity sha512-MFh0d/Wa7vkKO3Y3LlacqAEeHK0mckVqzDieUKTT+KGxi+zIpeVsFxymkIiRpbpDziHc290Xr9A1O4Om7otoRA==
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/neo-async/-/neo-async-2.6.1.tgz#ac27ada66167fa8849a6addd837f6b189ad2081c"
+  integrity sha512-iyam8fBuCUpWeKPGpaNMetEocMt364qkCsfL9JuhjXX6dRnguRVOfk2GZaDpPjcOKiiXCPINZC1GczQ7iTq3Zw==
 
 nice-try@^1.0.4:
   version "1.0.5"
@@ -7888,15 +7940,15 @@ react-dev-utils@^9.0.1:
     strip-ansi "5.2.0"
     text-table "0.2.0"
 
-react-dom@16.8.6:
-  version "16.8.6"
-  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.8.6.tgz#71d6303f631e8b0097f56165ef608f051ff6e10f"
-  integrity sha512-1nL7PIq9LTL3fthPqwkvr2zY7phIPjYrT0jp4HjyEQrEROnw4dG41VVwi/wfoCneoleqrNX7iAD+pXebJZwrwA==
+react-dom@^16.8.6:
+  version "16.12.0"
+  resolved "https://registry.yarnpkg.com/react-dom/-/react-dom-16.12.0.tgz#0da4b714b8d13c2038c9396b54a92baea633fe11"
+  integrity sha512-LMxFfAGrcS3kETtQaCkTKjMiifahaMySFDn71fZUNpPHZQEzmk/GiAeIT8JSOrHB23fnuCOMruL2a8NYlw+8Gw==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.13.6"
+    scheduler "^0.18.0"
 
 react-error-overlay@^5.1.6:
   version "5.1.6"
@@ -7968,15 +8020,14 @@ react-scripts@3.0.1:
   optionalDependencies:
     fsevents "2.0.6"
 
-react@16.8.6:
-  version "16.8.6"
-  resolved "https://registry.yarnpkg.com/react/-/react-16.8.6.tgz#ad6c3a9614fd3a4e9ef51117f54d888da01f2bbe"
-  integrity sha512-pC0uMkhLaHm11ZSJULfOBqV4tIZkx87ZLvbbQYunNixAAvjnC+snJCg0XQXn9VIsttVsbZP/H/ewzgsd5fxKXw==
+react@^16.8.6:
+  version "16.12.0"
+  resolved "https://registry.yarnpkg.com/react/-/react-16.12.0.tgz#0c0a9c6a142429e3614834d5a778e18aa78a0b83"
+  integrity sha512-fglqy3k5E+81pA8s+7K0/T3DBCF0ZDOher1elBFzF7O6arXJgzyu/FW+COxFvAWXJoJN9KIZbT2LXlukwphYTA==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
     prop-types "^15.6.2"
-    scheduler "^0.13.6"
 
 read-pkg-up@^2.0.0:
   version "2.0.0"
@@ -8012,6 +8063,15 @@ read-pkg@^3.0.0:
     normalize-package-data "^2.3.2"
     path-type "^3.0.0"
 
+read-pkg@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/read-pkg/-/read-pkg-4.0.1.tgz#963625378f3e1c4d48c85872b5a6ec7d5d093237"
+  integrity sha1-ljYlN48+HE1IyFhytabsfV0JMjc=
+  dependencies:
+    normalize-package-data "^2.3.2"
+    parse-json "^4.0.0"
+    pify "^3.0.0"
+
 "readable-stream@1 || 2", readable-stream@^2.0.0, readable-stream@^2.0.1, readable-stream@^2.0.2, readable-stream@^2.0.6, readable-stream@^2.1.5, readable-stream@^2.2.2, readable-stream@^2.3.3, readable-stream@^2.3.6, readable-stream@~2.3.6:
   version "2.3.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.3.6.tgz#b11c27d88b8ff1fbe070643cf94b0c79ae1b0aaf"
@@ -8350,6 +8410,13 @@ rxjs@^6.4.0:
   dependencies:
     tslib "^1.9.0"
 
+rxjs@^6.5.2:
+  version "6.5.4"
+  resolved "https://registry.yarnpkg.com/rxjs/-/rxjs-6.5.4.tgz#e0777fe0d184cec7872df147f303572d414e211c"
+  integrity sha512-naMQXcgEo3csAEGvw/NydRA0fuS2nDZJiw1YUWFKU7aPPAPGZEsD4Iimit96qwCieH6y614MCLYwdkrWx7z/7Q==
+  dependencies:
+    tslib "^1.9.0"
+
 safe-buffer@5.1.2, safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.1, safe-buffer@^5.1.2, safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
@@ -8406,10 +8473,10 @@ saxes@^3.1.9:
   dependencies:
     xmlchars "^1.3.1"
 
-scheduler@^0.13.6:
-  version "0.13.6"
-  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.13.6.tgz#466a4ec332467b31a91b9bf74e5347072e4cd889"
-  integrity sha512-IWnObHt413ucAYKsD9J1QShUKkbKLQQHdxRyw73sw4FN26iWr3DY/H34xGPe4nmL1DwXyWmSWmMrA9TfQbE/XQ==
+scheduler@^0.18.0:
+  version "0.18.0"
+  resolved "https://registry.yarnpkg.com/scheduler/-/scheduler-0.18.0.tgz#5901ad6659bc1d8f3fdaf36eb7a67b0d6746b1c4"
+  integrity sha512-agTSHR1Nbfi6ulI0kYNK0203joW2Y5W4po4l+v03tOoiJKpTBbxpNhWDvqc/4IcOw+KLmSiQLTasZ4cab2/UWQ==
   dependencies:
     loose-envify "^1.1.0"
     object-assign "^4.1.1"
@@ -8716,6 +8783,11 @@ space-separated-tokens@^1.0.0:
   resolved "https://registry.yarnpkg.com/space-separated-tokens/-/space-separated-tokens-1.1.3.tgz#bc6500e116d13285a94b59b58c44c7f045fe6124"
   integrity sha512-/M5RAdBuQlSDPNfA5ube+fkHbHyY08pMuADLmsAQURzo56w90r681oiOoz3o3ZQyWdSeNucpTFjL+Ggd5qui3w==
 
+spawn-command@^0.0.2-1:
+  version "0.0.2-1"
+  resolved "https://registry.yarnpkg.com/spawn-command/-/spawn-command-0.0.2-1.tgz#62f5e9466981c1b796dc5929937e11c9c6921bd0"
+  integrity sha1-YvXpRmmBwbeW3Fkpk34RycaSG9A=
+
 spdx-correct@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/spdx-correct/-/spdx-correct-3.1.0.tgz#fb83e504445268f154b074e218c87c003cd31df4"
@@ -8987,6 +9059,13 @@ supports-color@^2.0.0:
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-2.0.0.tgz#535d045ce6b6363fa40117084629995e9df324c7"
   integrity sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=
 
+supports-color@^4.5.0:
+  version "4.5.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.5.0.tgz#be7a0de484dec5c5cddf8b3d59125044912f635b"
+  integrity sha1-vnoN5ITexcXN34s9WRJQRJEvY1s=
+  dependencies:
+    has-flag "^2.0.0"
+
 supports-color@^5.3.0:
   version "5.5.0"
   resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
@@ -9197,6 +9276,11 @@ tr46@^1.0.1:
   dependencies:
     punycode "^2.1.0"
 
+tree-kill@^1.2.1:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/tree-kill/-/tree-kill-1.2.2.tgz#4ca09a9092c88b73a7cdc5e8a01b507b0790a0cc"
+  integrity sha512-L0Orpi8qGpRG//Nd+H90vFB+3iHnue1zSSGmNOOCh1GLJ7rUKVwV2HvijphGQS2UmhUZewS9VgvxYIdgr+fG1A==
+
 trim-right@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/trim-right/-/trim-right-1.0.1.tgz#cb2e1203067e0c8de1f614094b9fe45704ea6003"
@@ -9275,11 +9359,11 @@ uglify-js@3.4.x:
     source-map "~0.6.1"
 
 uglify-js@^3.1.4:
-  version "3.5.11"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.5.11.tgz#833442c0aa29b3a7d34344c7c63adaa3f3504f6a"
-  integrity sha512-izPJg8RsSyqxbdnqX36ExpbH3K7tDBsAU/VfNv89VkMFy3z39zFjunQGsSHOlGlyIfGLGprGeosgQno3bo2/Kg==
+  version "3.7.3"
+  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-3.7.3.tgz#f918fce9182f466d5140f24bb0ff35c2d32dcc6a"
+  integrity sha512-7tINm46/3puUA4hCkKYo4Xdts+JDaVC9ZPRcG8Xw9R4nhO/gZgUM3TENq8IF4Vatk8qCig4MzP/c8G4u2BkVQg==
   dependencies:
-    commander "~2.20.0"
+    commander "~2.20.3"
     source-map "~0.6.1"
 
 unicode-canonical-property-names-ecmascript@^1.0.4:
@@ -9472,6 +9556,11 @@ utila@^0.4.0, utila@~0.4:
   resolved "https://registry.yarnpkg.com/utila/-/utila-0.4.0.tgz#8a16a05d445657a3aea5eecc5b12a4fa5379772c"
   integrity sha1-ihagXURWV6Oupe7MWxKk+lN5dyw=
 
+utility-types@^3.7.0:
+  version "3.10.0"
+  resolved "https://registry.yarnpkg.com/utility-types/-/utility-types-3.10.0.tgz#ea4148f9a741015f05ed74fd615e1d20e6bed82b"
+  integrity sha512-O11mqxmi7wMKCo6HKFt5AhO4BwY3VV68YU07tgxfz8zJTIxr4BpsezN49Ffwy9j3ZpwwJp4fkRwjRzq3uWE6Rg==
+
 utils-merge@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
@@ -10039,7 +10128,7 @@ yargs@12.0.2:
     y18n "^3.2.1 || ^4.0.0"
     yargs-parser "^10.1.0"
 
-yargs@^12.0.2:
+yargs@^12.0.2, yargs@^12.0.5:
   version "12.0.5"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-12.0.5.tgz#05f5997b609647b64f66b81e3b4b10a368e7ad13"
   integrity sha512-Lhz8TLaYnxq/2ObqHDql8dX8CJi97oHxrjUcYtzKbbykPtVW9WB+poxI+NM2UIzsMgNCZTIf0AQwsjK5yMAqZw==