feat: implement (optional) semver parsing of version

[radeksimko]

Fixes #157

I admit my JavaScript-fu is very rusty. I welcome any feedback. Also there's perhaps more changes outside of the context of the original problem - I'd be happy to extract these into separate PRs, if necessary.

[codecov]

Codecov Report

Merging #213 into master will decrease coverage by 1.74%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #213      +/-   ##
==========================================
- Coverage   90.76%   89.02%   -1.75%     
==========================================
  Files           4        4              
  Lines          65       82      +17     
  Branches        9       12       +3     
==========================================
+ Hits           59       73      +14     
- Misses          3        5       +2     
- Partials        3        4       +1     

Impacted Files	Coverage Δ
src/github.ts	86.36% <83.33%> (-13.64%)	⬇️

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[crazy-max]

@radeksimko

I admit my JavaScript-fu is very rusty. I welcome any feedback.

Yeah me too hehe. I'll do a review soon. Thanks for your contribution!

[caarlos0]

LGTM but my TS-fu is even worse than my JS-fu :D

[crazy-max]

@radeksimko The README would also need to be updated to address this new feature. And also run npm run pre-checkin and push changes. Thanks!

[radeksimko]

@crazy-max I believe I addressed all your comments.

The implementation doesn't require GitHub token nor GitHub SDK anymore as it leverages the static JSON as discussed.

PTAL.

[crazy-max]

@radeksimko LGTM!