Make regex filters case insensitive

lib/frenzy/pipeline/filter_engine.ex

@@ -119,7 +119,7 @@ defmodule Frenzy.Pipeline.FilterEngine do
   end
 
   defp matches(value, "matches_regex", param) do
-    {:ok, regex} = Regex.compile(param)
+    {:ok, regex} = Regex.compile(param, "i")
     String.match?(value, regex)
   end