Update chokidar to version 3.3.0 (#300)

Closes #275

Co-authored-by: greenkeeper[bot] <23040076+greenkeeper[bot]@users.noreply.github.com>

Author: RyanZim

package.json

@@ -19,7 +19,7 @@
   },
   "dependencies": {
     "chalk": "^2.1.0",
-    "chokidar": "^2.0.0",
+    "chokidar": "^3.3.0",
     "dependency-graph": "^0.8.0",
     "fs-extra": "^7.0.0",
     "get-stdin": "^7.0.0",