[CLEANUP chore-dependencies] Major dependencies upgrade

[sergiitk]

What's this PR do?

• Node packages major upgrade:

 devDependencies
   name                       range   from        to      url
 ◯ @semantic-release/git      latest  7.0.18   ❯  8.0.0   https://github.com/semantic-release/git#readme
 ◯ ava                        latest  2.4.0    ❯  3.0.0   https://avajs.dev
 ◯ css-loader                 latest  2.1.1    ❯  3.4.2   https://github.com/webpack-contrib/css-loader
 ◯ eslint                     latest  5.16.0   ❯  6.8.0   https://eslint.org
 ◯ eslint-config-airbnb       latest  17.1.1   ❯  18.0.1  https://github.com/airbnb/javascript
 ◯ eslint-config-airbnb-base  latest  13.2.0   ❯  14.0.0  https://github.com/airbnb/javascript
 ◯ eslint-plugin-ava          latest  7.1.0    ❯  10.0.0  https://github.com/avajs/eslint-plugin-ava#readme
 ◯ mini-css-extract-plugin    latest  0.7.0    ❯  0.9.0   https://github.com/webpack-contrib/mini-css-extract-plugin
 ◯ nodemon                    latest  1.19.4   ❯  2.0.2   http://nodemon.io
 ◯ nyc                        latest  14.1.1   ❯  15.0.0  https://github.com/istanbuljs/nyc#readme
 ◯ puppeteer-core             latest  1.11.0   ❯  2.0.0   https://github.com/GoogleChrome/puppeteer#readme
 ◯ sass-loader                latest  7.3.1    ❯  8.0.2   https://github.com/webpack-contrib/sass-loader
 ◯ semantic-release           latest  15.14.0  ❯  16.0.2  https://github.com/semantic-release/semantic-release#readme
 ◯ sinon                      latest  7.5.0    ❯  8.1.0   https://sinonjs.org/
 ◯ style-loader               latest  0.23.1   ❯  1.1.3   https://github.com/webpack-contrib/style-loader

• Direct dependencies upgraded for

> yarn output, f.e:
├─ @semantic-release/git@8.0.0
├─ ava@3.0.0
├─ css-loader@3.4.2
├─ eslint-config-airbnb@18.0.1
├─ eslint-plugin-ava@10.0.0
├─ eslint@6.8.0
├─ mini-css-extract-plugin@0.9.0
├─ nodemon@2.0.2
├─ nyc@15.0.0
├─ puppeteer-core@2.0.0
├─ sass-loader@8.0.2
├─ semantic-release@16.0.2
├─ sinon@8.1.0
├─ style-loader@1.1.3

Backward-incompatible upgrades

eslint, eslint-*

• Updated code style or eslint ignore rules according to the latest ruleset
• Fixes 76deccf 177f6d9 745e116

ava

• Major upgrade, breaking changes
• Fixes: a504980

[codecov]

Codecov Report

Merging #130 into master will increase coverage by 0.08%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master    #130      +/-   ##
=========================================
+ Coverage    7.19%   7.28%   +0.08%     
=========================================
  Files          24      22       -2     
  Lines         514     508       -6     
=========================================
  Hits           37      37              
+ Misses        477     471       -6

Impacted Files	Coverage Δ
src/app/Timer.js	0% <0%> (ø)	⬆️
src/services/PagerDutyClient.js	0% <0%> (ø)	⬆️
src/init.js	0% <0%> (ø)	⬆️
src/models/Schedule.js	50% <0%> (ø)	⬆️
.releaserc.js

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[sergiitk]

🎉 This PR is included in version 1.0.3 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀