Merge pull request #19 from mxxk-forks/bump-re2

Bump `re2` to 1.21.4

Author: eliottvincent

package.json

@@ -23,7 +23,7 @@
     "nodeunit-x": "0.15.0"
   },
   "dependencies": {
-    "re2": "1.20.7"
+    "re2": "1.21.4"
   },
   "keywords": [
     "parser",