feat(typescript): update to typescript 3.3.3

Author: adamdbradley

package.json

@@ -55,7 +55,7 @@
   "dependencies": {
     "chokidar": "2.0.3",
     "jsdom": "11.11.0",
-    "typescript": "3.2.2"
+    "typescript": "3.3.3"
   },
   "devDependencies": {
     "@types/autoprefixer": "^9.1.0",