Bump org.mozilla:rhino from 1.7.13 to 1.7.15

Bumps [org.mozilla:rhino](https://github.com/mozilla/rhino) from 1.7.13 to 1.7.15.
- [Release notes](https://github.com/mozilla/rhino/releases)
- [Changelog](https://github.com/mozilla/rhino/blob/master/RELEASE-NOTES.md)
- [Commits](https://github.com/mozilla/rhino/commits)

---
updated-dependencies:
- dependency-name: org.mozilla:rhino
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

extractor/build.gradle

@@ -31,7 +31,7 @@ dependencies {
 
     // do not upgrade to 1.7.14, since in 1.7.14 Rhino uses the `SourceVersion` class, which is not
     // available on Android (even when using desugaring), and `NoClassDefFoundError` is thrown
-    implementation 'org.mozilla:rhino:1.7.13'
+    implementation 'org.mozilla:rhino:1.7.15'
 
     checkstyle "com.puppycrawl.tools:checkstyle:$checkstyleVersion"