Bump parser from 2.7.0.2 to 2.7.0.3

Bumps [parser](https://github.com/whitequark/parser) from 2.7.0.2 to 2.7.0.3.
- [Release notes](https://github.com/whitequark/parser/releases)
- [Changelog](https://github.com/whitequark/parser/blob/master/CHANGELOG.md)
- [Commits](whitequark/parser@v2.7.0.2...v2.7.0.3)

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

Gemfile.lock

@@ -55,7 +55,7 @@ GEM
     naught (1.1.0)
     oj (3.10.2)
     parallel (1.19.1)
-    parser (2.7.0.2)
+    parser (2.7.0.3)
       ast (~> 2.4.0)
     power_assert (1.1.6)
     pry (0.12.2)