Bump logger from 1.6.6 to 1.7.0

Bumps [logger](https://github.com/ruby/logger) from 1.6.6 to 1.7.0.
- [Release notes](https://github.com/ruby/logger/releases)
- [Commits](ruby/logger@v1.6.6...v1.7.0)

---
updated-dependencies:
- dependency-name: logger
  dependency-version: 1.7.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -92,7 +92,7 @@ GEM
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
-    logger (1.6.6)
+    logger (1.7.0)
     memoist (0.16.2)
     middleman (4.5.1)
       coffee-script (~> 2.2)