chore: add ht_data_postgres dependency and update logging version

Author: fulleni

pubspec.yaml

@@ -15,6 +15,9 @@ dependencies:
   ht_data_inmemory:
     git:
       url: https://github.com/headlines-toolkit/ht-data-inmemory.git
+  ht_data_postgres:
+    git:
+      url: https://github.com/headlines-toolkit/ht-data-postgres.git  
   ht_data_repository:
     git:
       url: https://github.com/headlines-toolkit/ht-data-repository.git
@@ -34,7 +37,9 @@ dependencies:
     git:
       url: https://github.com/headlines-toolkit/ht-shared.git
 
+  logging: ^1.3.0
   meta: ^1.16.0
+  postgres: ^3.5.6
   shelf_cors_headers: ^0.1.5
   uuid: ^4.5.1