Bump rack-cors from 2.0.2 to 3.0.0

Bumps [rack-cors](https://github.com/cyu/rack-cors) from 2.0.2 to 3.0.0.
- [Changelog](https://github.com/cyu/rack-cors/blob/master/CHANGELOG.md)
- [Commits](cyu/rack-cors@v2.0.2...v3.0.0)

---
updated-dependencies:
- dependency-name: rack-cors
  dependency-version: 3.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -393,9 +393,10 @@ GEM
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)
-    rack (3.1.13)
-    rack-cors (2.0.2)
-      rack (>= 2.0.0)
+    rack (3.1.15)
+    rack-cors (3.0.0)
+      logger
+      rack (>= 3.0.14)
     rack-session (2.1.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)