Bump strong_migrations from 0.6.8 to 0.7.0

Bumps [strong_migrations](https://github.com/ankane/strong_migrations) from 0.6.8 to 0.7.0.
- [Release notes](https://github.com/ankane/strong_migrations/releases)
- [Changelog](https://github.com/ankane/strong_migrations/blob/master/CHANGELOG.md)
- [Commits](ankane/strong_migrations@v0.6.8...v0.7.0)

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

Gemfile.lock

@@ -221,7 +221,7 @@ GEM
     html_tokenizer (0.0.7)
     htmlentities (4.3.4)
     http_accept_language (2.1.1)
-    i18n (1.8.3)
+    i18n (1.8.4)
       concurrent-ruby (~> 1.0)
     i18n-js (3.7.1)
       i18n (>= 0.6.6)
@@ -439,7 +439,7 @@ GEM
       actionpack (>= 4.0)
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
-    strong_migrations (0.6.8)
+    strong_migrations (0.7.0)
       activerecord (>= 5)
     sync (0.5.0)
     term-ansicolor (1.7.1)
@@ -466,7 +466,7 @@ GEM
     websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.3.1)
+    zeitwerk (2.4.0)
 
 PLATFORMS
   ruby