Update dependency rouge to v4.5.2

Author: renovate[bot]

Gemfile.lock

@@ -103,7 +103,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rexml (3.2.6)
-    rouge (4.1.3)
+    rouge (4.5.2)
     ruby-rc4 (0.1.5)
     ruby2_keywords (0.0.5)
     safe_yaml (1.0.5)