Bump lefthook from 0.6.5 to 0.6.6 (#60)

Bumps [lefthook](https://github.com/Arkweid/lefthook) from 0.6.5 to 0.6.6.
- [Release notes](https://github.com/Arkweid/lefthook/releases)
- [Changelog](https://github.com/Arkweid/lefthook/blob/master/CHANGELOG.md)
- [Commits](evilmartians/lefthook@v0.6.5...v0.6.6)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile.lock

@@ -53,7 +53,7 @@ GEM
     gherkin (5.1.0)
     jaro_winkler (1.5.4)
     json (2.2.0)
-    lefthook (0.6.5)
+    lefthook (0.6.6)
     macaddr (1.7.2)
       systemu (~> 2.6.5)
     maruku (0.7.3)