Bump filterrific from 5.1.0 to 5.2.0

Bumps [filterrific](https://github.com/jhund/filterrific) from 5.1.0 to 5.2.0.
- [Release notes](https://github.com/jhund/filterrific/releases)
- [Changelog](https://github.com/jhund/filterrific/blob/master/CHANGELOG.md)
- [Commits](jhund/filterrific@v5.1.0...v5.2.0)

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

Gemfile.lock

@@ -107,7 +107,7 @@ GEM
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     ffi (1.9.25)
-    filterrific (5.1.0)
+    filterrific (5.2.0)
     font-awesome-rails (4.7.0.4)
       railties (>= 3.2, < 6.0)
     formtastic (3.1.5)