Bump rack-cors from 2.0.1 to 2.0.2

Bumps [rack-cors](https://github.com/cyu/rack-cors) from 2.0.1 to 2.0.2.
- [Changelog](https://github.com/cyu/rack-cors/blob/master/CHANGELOG.md)
- [Commits](cyu/rack-cors@v2.0.1...v2.0.2)

---
updated-dependencies:
- dependency-name: rack-cors
  dependency-type: direct:production
...

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

Gemfile.lock

@@ -289,7 +289,7 @@ GEM
       activesupport (>= 3.0.0)
     racc (1.7.3)
     rack (2.2.9)
-    rack-cors (2.0.1)
+    rack-cors (2.0.2)
       rack (>= 2.0.0)
     rack-test (2.1.0)
       rack (>= 1.3)