feat: add custom logger interface

[chingor13]

• Add a CheckpointLogger which outputs similar output to the checkpoint function.

Fixes #883

[codecov]

Codecov Report

Merging #884 (8f3ee3e) into master (e3535c6) will increase coverage by 0.08%.
The diff coverage is 84.23%.

@@            Coverage Diff             @@
##           master     #884      +/-   ##
==========================================
+ Coverage   94.29%   94.37%   +0.08%     
==========================================
  Files          71       72       +1     
  Lines        9707     9693      -14     
  Branches      974     1031      +57     
==========================================
- Hits         9153     9148       -5     
+ Misses        551      542       -9     
  Partials        3        3              

Impacted Files	Coverage Δ
src/util/checkpoint.ts	79.41% <16.66%> (-12.02%)	⬇️
src/releasers/ruby-yoshi.ts	27.37% <25.00%> (+0.59%)	⬆️
src/releasers/go-yoshi.ts	93.26% <33.33%> (+0.48%)	⬆️
src/releasers/php-yoshi.ts	94.18% <50.00%> (+1.08%)	⬆️
src/releasers/java-yoshi.ts	90.90% <66.66%> (+0.13%)	⬆️
src/releasers/rust.ts	94.24% <66.66%> (+0.28%)	⬆️
src/updaters/php-manifest.ts	92.42% <66.66%> (+3.53%)	⬆️
src/updaters/root-composer.ts	90.90% <75.00%> (+4.46%)	⬆️
src/github.ts	90.24% <85.18%> (+0.04%)	⬆️
src/updaters/rust/cargo-toml.ts	99.24% <90.90%> (-0.04%)	⬇️
... and 15 more

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[bcoe]

This looks good to me, as soon as you're ready to turn it into a PR.