Handle semver tags

[crazy-max]

Closes #10
Closes #6

cc. @fastlorenzo

[codecov]

Codecov Report

Merging #14 (7b84134) into master (009f84c) will increase coverage by 0.93%.
The diff coverage is 72.00%.

@@            Coverage Diff             @@
##           master      #14      +/-   ##
==========================================
+ Coverage   71.21%   72.15%   +0.93%     
==========================================
  Files           3        3              
  Lines          66       79      +13     
  Branches       14       17       +3     
==========================================
+ Hits           47       57      +10     
  Misses          6        6              
- Partials       13       16       +3     

Impacted Files	Coverage Δ
src/context.ts	92.30% <ø> (ø)
src/meta.ts	73.68% <72.00%> (+0.95%)	⬆️

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[fastlorenzo]

awesome, thanks @crazy-max !