feat: adds additional updaters/logic for PHP mono-repo

[bcoe]

Additional Updaters

• PHPClientVersion: updates the const version in client libraries.
• PHPManifest: adds new version to array in manifest.
• RootComposer: adds updated version to root composer file.

TODO

• tests need to be updated.

[codecov]

Codecov Report

Merging #195 into master will increase coverage by 3.3%.
The diff coverage is 82.23%.

@@            Coverage Diff            @@
##           master     #195     +/-   ##
=========================================
+ Coverage   69.32%   72.63%   +3.3%     
=========================================
  Files          12       15      +3     
  Lines        1842     2123    +281     
  Branches      157      182     +25     
=========================================
+ Hits         1277     1542    +265     
- Misses        555      571     +16     
  Partials       10       10

Impacted Files	Coverage Δ
src/updaters/version.ts	95.23% <100%> (+0.11%)	⬆️
src/updaters/package-json.ts	95.65% <100%> (+0.09%)	⬆️
src/updaters/samples-package-json.ts	95.83% <100%> (+0.08%)	⬆️
src/updaters/changelog.ts	91.37% <100%> (-0.43%)	⬇️
src/github.ts	58.24% <33.33%> (+4.56%)	⬆️
src/github-release.ts	52.8% <50%> (-0.1%)	⬇️
src/updaters/php-manifest.ts	76.05% <76.05%> (ø)
src/updaters/root-composer.ts	83.87% <83.87%> (ø)
src/release-pr.ts	72.03% <87.15%> (+3.25%)	⬆️
src/updaters/php-client-version.ts	88.88% <88.88%> (ø)
... and 4 more

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