Merge pull request #7 from libtcod/dependabot/bundler/commonmarker-0.23.6

Bump commonmarker from 0.23.5 to 0.23.6

Author: HexDecimal

Gemfile.lock

@@ -14,7 +14,7 @@ GEM
       execjs
     coffee-script-source (1.11.1)
     colorator (1.1.0)
-    commonmarker (0.23.5)
+    commonmarker (0.23.6)
     concurrent-ruby (1.1.10)
     dnsruby (1.61.9)
       simpleidn (~> 0.1)