Upgrade to Pug 3

[borisovg]

• fix tests by removing broken test
• upgrade to Pug 3 and upgrade all dependencies
• configure Travis to test with Node 10, 12 and 14 (Pug 3 supports Node 10+)

closes #86

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@0eb8d37). Click here to learn what that means.
The diff coverage is 100.00%.

❗ Current head 7bd3d00 differs from pull request most recent head be4d10c. Consider uploading reports for the commit be4d10c to get more accurate results

@@            Coverage Diff             @@
##             master       #88   +/-   ##
==========================================
  Coverage          ?   100.00%           
==========================================
  Files             ?         1           
  Lines             ?       144           
  Branches          ?         0           
==========================================
  Hits              ?       144           
  Misses            ?         0           
  Partials          ?         0           

Impacted Files	Coverage Δ
index.js	100.00% <100.00%> (ø)

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[borisovg]

@ForbesLindesay sorry to bug, is anyone looking at this repo at all?

[Anduh]

• fix tests by removing broken test

@borisovg Did the test report your changes as failing, or is the test actually broken? Did it break before you updated the dependencies & made the changes, or afterwards? Removing a test bc it's broken doesn't sound like a fix per se.

Updating the pug-cli version is probably also needed for this change to automatically propagate, like #87 did. I've made PR to your update that updates the version & the changelog.

[Anduh]

@TimothyGu can you take a look at this? pub-cli haven't been updated to PUG 3 yet, and this PR is hopefully all that's needed.

[borisovg]

@Anduh the test was already failing before I made any changes and I didn’t see anything in the code specific to what that test was supposedly testing (rejecting UTF new lines)

[Anduh]

@borisovg I created the @anduh/pug-cli-package based on your update, so that there now exists an alternative package to this stagnant one.

Are you interested in becoming a co-maintainer of it? I haven't set up the Codecov or Travis CI stuff yet, but will look into it, if the original pug-cli doesn't get any attention by the authors.

I changed it's command to pug3, so one can have both pug-cli (using pug) & @anduh/pug-cli (using pug3) installed at the same time, without conflicting commands.

[mvorisek]

Is there any feedback left to address or can this PR be merged?