Add the ability to search with a global regex

Author: Mercedes Rey

src/util.js

@@ -60,7 +60,9 @@ export function searchStrings (strings, term, {caseSensitive, fuzzy, sortResults
         }
         if (exactMatch) {
           term = new RegExp('^' + term + '$', 'i')
-        }
+        } else if (regexMatch) {
+          term = new RegExp(term, 'i')
+	}
         if (value && value.search(term) !== -1) {
           return true
         }