Bump database_cleaner from 1.8.5 to 2.0.1

Bumps [database_cleaner](https://github.com/DatabaseCleaner/database_cleaner) from 1.8.5 to 2.0.1.
- [Release notes](https://github.com/DatabaseCleaner/database_cleaner/releases)
- [Changelog](https://github.com/DatabaseCleaner/database_cleaner/blob/master/History.rdoc)
- [Commits](DatabaseCleaner/database_cleaner@v1.8.5...v2.0.1)

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

Gemfile.lock

@@ -35,7 +35,12 @@ GEM
     concurrent-ruby (1.1.8)
     crack (0.4.5)
       rexml
-    database_cleaner (1.8.5)
+    database_cleaner (2.0.1)
+      database_cleaner-active_record (~> 2.0.0)
+    database_cleaner-active_record (2.0.0)
+      activerecord (>= 5.a)
+      database_cleaner-core (~> 2.0.0)
+    database_cleaner-core (2.0.1)
     debase (0.2.4.1)
       debase-ruby_core_source (>= 0.10.2)
     debase-ruby_core_source (0.10.12)