Update jest to 25.1 (#374)

* Update jest to 25.1

* Update acorn to 6.4.1

* Update dependencies, run audit on all packages, update packagelock

* Remove package-lock dependencies

package.json

@@ -42,7 +42,7 @@
     "@octokit/rest": "^16.43.1"
   },
   "devDependencies": {
-    "jest": "^24.7.1",
+    "jest": "^25.1.0",
     "proxy": "^1.0.1"
   }
 }