Bump rake-compiler from 1.2.5 to 1.2.8

Bumps [rake-compiler](https://github.com/luislavena/rake-compiler) from 1.2.5 to 1.2.8.
- [Release notes](https://github.com/luislavena/rake-compiler/releases)
- [Changelog](https://github.com/rake-compiler/rake-compiler/blob/master/History.md)
- [Commits](rake-compiler/rake-compiler@v1.2.5...v1.2.8)

---
updated-dependencies:
- dependency-name: rake-compiler
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -20,7 +20,7 @@ GEM
     racc (1.7.3)
     rainbow (3.1.1)
     rake (13.1.0)
-    rake-compiler (1.2.5)
+    rake-compiler (1.2.8)
       rake
     rb_sys (0.9.102)
     regexp_parser (2.9.0)