Build(deps): Bump strong_migrations from 1.7.0 to 1.8.0 (#616)

Bumps [strong_migrations](https://github.com/ankane/strong_migrations) from 1.7.0 to 1.8.0.
- [Changelog](https://github.com/ankane/strong_migrations/blob/master/CHANGELOG.md)
- [Commits](ankane/strong_migrations@v1.7.0...v1.8.0)

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

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

Gemfile.lock

@@ -104,7 +104,7 @@ GEM
       rake (>= 10.4, < 14.0)
     ast (2.4.2)
     base64 (0.2.0)
-    bigdecimal (3.1.6)
+    bigdecimal (3.1.7)
     bindex (0.8.1)
     brakeman (6.1.2)
       racc
@@ -178,7 +178,7 @@ GEM
     method_source (1.0.0)
     mini_magick (4.12.0)
     mini_mime (1.1.5)
-    minitest (5.22.2)
+    minitest (5.22.3)
     mutex_m (0.2.0)
     net-imap (0.4.10)
       date
@@ -332,7 +332,7 @@ GEM
     stimulus-rails (1.3.3)
       railties (>= 6.0.0)
     stringio (3.1.0)
-    strong_migrations (1.7.0)
+    strong_migrations (1.8.0)
       activerecord (>= 5.2)
     thor (1.3.1)
     timeout (0.4.1)