Use Github Actions

[Judahmeek]

This PR makes a number of changes, both to use Github Actions for CI & to get all specs passing in CI.

This change is 

[Judahmeek]

Reviewable status: 0 of 22 files reviewed, 8 unresolved discussions

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Gemfile line 46 at r1 (raw file):

# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# mini_racer is probably faster than therubyracer
gem "mini_racer", platforms: :ruby

Removed as a dependency because of shakacode/react_on_rails#1453

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Gemfile line 96 at r1 (raw file):

  gem "capybara"
  gem "capybara-screenshot"
  gem 'coveralls_reborn', '~> 0.25.0', require: false

coveralls is no longer maintained, so this is the new recommended fork.

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package.json line 94 at r1 (raw file):

    "babel-eslint": "^8.0.2",
    "babel-jest": "^23.4.2",
    "babel-loader": "^8.2.3",

redundant

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app/views/comments/index.html.erb line 27 at r1 (raw file):

        <td><%= link_to 'Edit', edit_comment_path(comment) %></td>
      </tr>
      <tr>

These changes weren't essential, but does create a better layout.

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client/app/bundles/comments/startup/NavigationBarApp.jsx line 26 at r1 (raw file):

    store = ReactOnRails.getStore('commentsStore', false);
  } else {
    return () => <NavigationBar {...{ pathname }} />;

This was the actual problem I was trying to fix with the changes to comments/startup files.

I could probably remove the other changes if you'd prefer that.

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client/app/packs/bootstrap.js line 1 at r1 (raw file):

import 'bootstrap-loader';

This pack was not used by any of the views.

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client/app/packs/client-bundle.js line 3 at r1 (raw file):

import ReactOnRails from 'react-on-rails';
import 'bootstrap-loader';
import 'expose-loader?exposes=$,jQuery!jquery';

It took me way longer than it should have to figure out this line was necessary in order to get destroy_comment_spec to pass.

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spec/system/add_new_comment_spec.rb line 3 at r1 (raw file):

# frozen_string_literal: true

require "rails_helper"

The specs structure was severely outdated so there are a lot of changes structure-wise although the commands/steps remain the same.

[Judahmeek]

Reviewable status: 0 of 22 files reviewed, 8 unresolved discussions

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spec/system/add_new_comment_spec.rb line 3 at r1 (raw file):

Previously, Judahmeek (Judah Meek) wrote…

The specs structure was severely outdated so there are a lot of changes structure-wise although the commands/steps remain the same.

The specs can be likely be DRYed up, just not through shared_contexts anymore.

[Judahmeek]

Note to self: jQuery is required for jquery_ujs, which is required because the destroy_comment_spec is testing a rails view, which deletes the CSS with jquery_ujs. Probably would be cleaner to remove jQuery, jquery_ujs, and just check for the comment details instead of the CSS.