Bump slim_lint from 0.30.0 to 0.31.0

Bumps [slim_lint](https://github.com/sds/slim-lint) from 0.30.0 to 0.31.0.
- [Release notes](https://github.com/sds/slim-lint/releases)
- [Changelog](https://github.com/sds/slim-lint/blob/main/CHANGELOG.md)
- [Commits](sds/slim-lint@v0.30.0...v0.31.0)

---
updated-dependencies:
- dependency-name: slim_lint
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -346,7 +346,7 @@ GEM
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
     retryable (3.0.5)
-    rexml (3.3.7)
+    rexml (3.3.8)
     rgeo (3.0.1)
     rgeo-activerecord (7.0.1)
       activerecord (>= 5.0)
@@ -431,7 +431,7 @@ GEM
       actionpack (>= 3.1)
       railties (>= 3.1)
       slim (>= 3.0, < 6.0, != 5.0.0)
-    slim_lint (0.30.0)
+    slim_lint (0.31.0)
       rexml (~> 3.2)
       rubocop (>= 1.0, < 2.0)
       slim (>= 3.0, < 6.0)