Bump webrick

Author: pixlwave

Gemfile.lock

@@ -275,7 +275,7 @@ GEM
       concurrent-ruby (~> 1.0)
     uber (0.1.0)
     unicode-display_width (2.5.0)
-    webrick (1.8.1)
+    webrick (1.9.0)
     word_wrap (1.0.0)
     xcode-install (2.8.1)
       claide (>= 0.9.1)