New Features
* Add `YarnInstall` post-checkout, post-commit, post-merge, and post-rewrite hooks
* Add [`metadata-json-lint`](https://voxpupuli.org/blog/2014/11/06/linting-metadata-json/) pre-commit hook
* Add [`RstLint`](https://github.com/twolfson/restructuredtext-lint) pre-commit
hook
* Add `YarnInstall` post-checkout, post-commit, post-merge, and post-rewrite hooks
* Add additional file patterns for `ChamberSecurity` pre-commit hook
* Add `ChamberCompare` and `ChamberVerification` pre-commit hooks
* Add `ComposerInstall` post-checkout, post-commit, post-merge, and post-rewrite hooks
* Add ability to `pre-push` hooks to inspect modified files for pushed refs
* Add [`PhpStan`](https://github.com/phpstan/phpstan) pre-commit hook
Changes
* Run `GoLint` pre-commit hook against each file individually
* Improve performance of `BundleAudit` checking of `Gemfile.lock` file
* Allow ad hoc hooks to run executables not tracked by Git
* Drop support for Ruby 2.0
Bug Fixes
* Fix `LineEndings` pre-commit hook handling of file paths with spaces
* Fix `Mdl` pre-commit hook message parsing regex
* Fix `RailsBestPractices` hook to only run against changed files
* Fix Overcommit installation in submodules
* Don't print backtrace of signature change for `overcommit --run`