Bump @types/node from 12.12.21 to 13.1.2 (#114)

Bump @types/node from 12.12.21 to 13.1.2

Author: dhkatz

package-lock.json

@@ -43,7 +43,7 @@
   },
   "devDependencies": {
     "@types/jest": "^24.0.0",
-    "@types/node": "^12.7.5",
+    "@types/node": "^13.1.2",
     "@types/vinyl": "^2.0.2",
     "coveralls": "^3.0.6",
     "jest": "^24.9.0",