Update dependencies to enable Greenkeeper 🌴 (#137)

Update dependencies to enable Greenkeeper 🌴

README.md

@@ -8,7 +8,7 @@
 [![Join the chat at https://gitter.im/squirrellyjs/Lobby](https://img.shields.io/gitter/room/squirrellyjs/squirrelly?color=%2346BC99)](https://gitter.im/squirrellyjs/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 [![Coveralls](https://img.shields.io/coveralls/squirrellyjs/squirrelly.svg)](https://coveralls.io/github/squirrellyjs/squirrelly)
 [![Dev Dependencies](https://img.shields.io/david/dev/squirrellyjs/squirrelly)](https://david-dm.org/squirrellyjs/squirrelly?type=dev)
-[![Donate](https://img.shields.io/badge/donate-paypal-blue.svg)](https://paypal.me/bengubler)
+[![Donate](https://img.shields.io/badge/donate-paypal-blue.svg)](https://paypal.me/bengubler) [![Greenkeeper badge](https://badges.greenkeeper.io/squirrellyjs/squirrelly.svg)](https://greenkeeper.io/)
 
 <!--Add all-contributors-->
 

package.json

@@ -108,8 +108,8 @@
     "cross-env": "^7.0.0",
     "cz-conventional-changelog": "^3.0.2",
     "husky": "^4.2.1",
-    "jest": "^24.9.0",
-    "jest-config": "^24.9.0",
+    "jest": "^25.1.0",
+    "jest-config": "^25.1.0",
     "lint-staged": "^10.0.3",
     "prettier-standard": "^16.1.0",
     "prompt": "^1.0.0",
@@ -125,9 +125,9 @@
     "rollup-plugin-typescript2": "^0.25.3",
     "shelljs": "^0.8.3",
     "travis-deploy-once": "^5.0.9",
-    "ts-jest": "^24.2.0",
+    "ts-jest": "^25.1.0",
     "ts-node": "^8.5.4",
-    "tslint": "^5.11.0",
+    "tslint": "^6.0.0",
     "tslint-config-prettier": "^1.15.0",
     "tslint-config-standard": "^9.0.0",
     "typedoc": "^0.16.7",