Add publish workflow

[s-weigand]

As discussed in #24 I added workflow to make a release when a tag is pushed.

Features:

• Makes a release on github when a tag is pushed
• Automatically sets the body of the release to the latest entry of the changelog
• Automatically uploads all assets
• If the tag starts with v (i.e. v1.23), the extension gets published on the chrome and firefox store.
  For this to work you need to set the proper secrets for the Google API and the AMO API. In my extension I found that you also need to provide the extension IDs that were given when published before, so it updates the addon instead of publishing a new one.
  • EXTENSION_ID = hoccpcefjcgnabbmojbfoflggkecmpgd
  • WEB_EXT_ID = {dd10a870-27c8-4b74-bfd4-0f767fe68770} Not needed anymore with web-ext^=5.0.0

[s-weigand]

Rebased the PR to fix the conflict ^^

[codecov-io]

Codecov Report

Merging #25 (0b754d5) into master (0e87e48) will decrease coverage by 0.04%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #25      +/-   ##
==========================================
- Coverage   16.85%   16.80%   -0.05%     
==========================================
  Files          19       19              
  Lines         362      363       +1     
  Branches       47       47              
==========================================
  Hits           61       61              
- Misses        299      300       +1     
  Partials        2        2              

Impacted Files	Coverage Δ
packages/ManifesFirefox.ts	0.00% <0.00%> (ø)

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