Bump flipper from 0.19.0 to 0.19.1 (#499)

Bumps [flipper](https://github.com/jnunemaker/flipper) from 0.19.0 to 0.19.1.
- [Release notes](https://github.com/jnunemaker/flipper/releases)
- [Changelog](https://github.com/jnunemaker/flipper/blob/master/Changelog.md)
- [Commits](flippercloud/flipper@v0.19.0...v0.19.1)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

Gemfile.lock

@@ -151,7 +151,7 @@ GEM
       i18n (>= 1.6, < 2)
     ffi (1.14.2)
     filterrific (5.2.1)
-    flipper (0.19.0)
+    flipper (0.19.1)
     flipper-active_record (0.19.0)
       activerecord (>= 5.0, < 7)
       flipper (~> 0.19.0)