Bump parser from 2.7.1.4 to 2.7.1.5 (#14879)

Bumps [parser](https://github.com/whitequark/parser) from 2.7.1.4 to 2.7.1.5.
- [Release notes](https://github.com/whitequark/parser/releases)
- [Changelog](https://github.com/whitequark/parser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/whitequark/parser/compare/v2.7.1.4...v2.7.1.5)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -399,7 +399,7 @@ GEM
     parallel (1.19.2)
     parallel_tests (3.3.0)
       parallel
-    parser (2.7.1.4)
+    parser (2.7.1.5)
       ast (~> 2.4.1)
     parslet (2.0.0)
     pastel (0.8.0)