Bump strong_migrations from 0.7.3 to 0.7.4 (#11938)

Bumps [strong_migrations](https://github.com/ankane/strong_migrations) from 0.7.3 to 0.7.4.
- [Release notes](https://github.com/ankane/strong_migrations/releases)
- [Changelog](https://github.com/ankane/strong_migrations/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ankane/strong_migrations/compare/v0.7.3...v0.7.4)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -734,7 +734,7 @@ GEM
       dante (>= 0.2.0)
       multi_json (~> 1.0)
       stripe (> 5, < 6)
-    strong_migrations (0.7.3)
+    strong_migrations (0.7.4)
       activerecord (>= 5)
     test-prof (0.12.2)
     thor (0.20.3)
@@ -756,7 +756,7 @@ GEM
       multipart-post (~> 2.0)
       naught (~> 1.0)
       simple_oauth (~> 0.3.0)
-    tzinfo (1.2.8)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)