Feature: 'semver get'

[chriskilding]

Fixes #9

[chriskilding]

Questions:

• Should this be called 'get'? Or is another more *nix-like name more appropriate?
• Should the tests from other 'get-' subcommands be reallocated to this one?
• Should the other 'get-' subcommands be subsumed into this one as CLI flag arguments?
  • Example: semver get --major <version>
  • Example: semver get --minor <version>
• Should the 'decrement-' and 'increment-' subcommands be redesigned to take (mandatory) CLI flag arguments? Example: semver increment --major <version> No - because the component indicator for those commands is mandatory, not optional. At least, no need to change them in the initial release.
• Should it let users pick a custom delimiter character? No - not in version 1.
• Should it take a custom 'printf'-style C-string (search and replace '%major', '%minor' etc)? No - there is little precedent for printf with app-specific replacement markers in other *nix CLI programs (except maybe for printk in the Linux kernel). This would make it harder to use than standard CLI flag arguments.
• Should it take a custom awk program (interpolate '$1', '$2' etc) which is then actually passed to awk under the covers? No - this would have to be passed to a bash invocation of awk under the hood.

[codecov]

Codecov Report

Merging #27 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #27   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines         199    230   +31     
  Branches       20     24    +4     
=====================================
+ Hits          199    230   +31

Impacted Files	Coverage Δ
semver	100% <100%> (ø)	⬆️

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