Bump debug from 1.7.2 to 1.8.0

Bumps [debug](https://github.com/ruby/debug) from 1.7.2 to 1.8.0.
- [Release notes](https://github.com/ruby/debug/releases)
- [Commits](ruby/debug@v1.7.2...v1.8.0)

---
updated-dependencies:
- dependency-name: debug
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -6,7 +6,7 @@ GEM
     builder (3.2.3)
     coderay (1.1.3)
     concurrent-ruby (1.1.10)
-    debug (1.7.2)
+    debug (1.8.0)
       irb (>= 1.5.0)
       reline (>= 0.3.1)
     descendants_tracker (0.0.4)
@@ -27,7 +27,7 @@ GEM
     i18n (1.12.0)
       concurrent-ruby (~> 1.0)
     io-console (0.6.0)
-    irb (1.6.3)
+    irb (1.6.4)
       reline (>= 0.3.0)
     jeweler (2.3.9)
       builder