Merge pull request #69 from mruby/dependabot/bundler/yard-0.9.20

Bump yard from 0.9.19 to 0.9.20

Author: matz

Gemfile.lock

@@ -240,7 +240,7 @@ GEM
     tzinfo (1.2.5)
       thread_safe (~> 0.1)
     unicode-display_width (1.6.0)
-    yard (0.9.19)
+    yard (0.9.20)
     yard-coderay (0.1.0)
       coderay
       yard