fix(cli): fix error thrown by findUp when a config doesn't exist (#127)

* fix(cli): fix error thrown by findUp when a config doesn't exist

When findUp can't find an existing package-scripts.js file, it returns null, which is passed back to
findUp and throws an error because path.resolve can only accept strings as arguments

#124

* docs(contributors): add @natecavanaugh to the contributors table

* docs(contributors): Fix contributors table

The contributions array in .all-contributorsrc was missing the "code" value

Author: natecavanaugh

.all-contributorsrc

@@ -266,6 +266,15 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "natecavanaugh",
+      "name": "Nate Cavanaugh",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/116871?v=3",
+      "profile": "http://alterform.com",
+      "contributions": [
+        "code"
+      ]
     }
   ]
-}
+}

README.md

@@ -13,7 +13,7 @@ All the benefits of npm scripts without the cost of a bloated package.json and l
 [![downloads][downloads-badge]][npm-stat]
 [![MIT License][license-badge]][LICENSE]
 
-[![All Contributors](https://img.shields.io/badge/all_contributors-26-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-27-orange.svg?style=flat-square)](#contributors)
 [![PRs Welcome][prs-badge]][prs]
 [![Donate][donate-badge]][donate]
 [![Code of Conduct][coc-badge]][coc]
@@ -437,7 +437,7 @@ Thanks goes to these people ([emoji key][emojis]):
 | :---: | :---: | :---: | :---: | :---: | :---: | :---: |
 | [<img src="https://avatars.githubusercontent.com/u/1972567?v=3" width="100px;"/><br /><sub>Tommy</sub>](http://www.tommyleunen.com)<br />[🐛](https://github.com/kentcdodds/p-s/issues?q=author%3Atleunen) [💻](https://github.com/kentcdodds/p-s/commits?author=tleunen) [⚠️](https://github.com/kentcdodds/p-s/commits?author=tleunen) 👀 | [<img src="https://avatars.githubusercontent.com/u/509946?v=3" width="100px;"/><br /><sub>Jayson Harshbarger</sub>](http://www.hypercubed.com)<br />💡 👀 | [<img src="https://avatars.githubusercontent.com/u/1355481?v=3" width="100px;"/><br /><sub>JD Isaacks</sub>](http://www.jisaacks.com)<br />[💻](https://github.com/kentcdodds/p-s/commits?author=jisaacks) [⚠️](https://github.com/kentcdodds/p-s/commits?author=jisaacks) | [<img src="https://avatars.githubusercontent.com/u/924465?v=3" width="100px;"/><br /><sub>Christopher Hiller</sub>](https://boneskull.com)<br />👀 | [<img src="https://avatars.githubusercontent.com/u/1834413?v=3" width="100px;"/><br /><sub>Robin Malfait</sub>](https://robinmalfait.com)<br />💡 | [<img src="https://avatars.githubusercontent.com/u/622118?v=3" width="100px;"/><br /><sub>Eric McCormick</sub>](https://ericmccormick.io)<br />👀 [📖](https://github.com/kentcdodds/p-s/commits?author=edm00se) | [<img src="https://avatars.githubusercontent.com/u/1913805?v=3" width="100px;"/><br /><sub>Sam Verschueren</sub>](https://twitter.com/SamVerschueren)<br />👀 |
 | [<img src="https://avatars.githubusercontent.com/u/1155589?v=3" width="100px;"/><br /><sub>Sorin Muntean</sub>](https://github.com/sxn)<br />[💻](https://github.com/kentcdodds/p-s/commits?author=sxn) [⚠️](https://github.com/kentcdodds/p-s/commits?author=sxn) [📖](https://github.com/kentcdodds/p-s/commits?author=sxn) | [<img src="https://avatars.githubusercontent.com/u/1970063?v=3" width="100px;"/><br /><sub>Keith Gunn</sub>](https://github.com/gunnx)<br />[🐛](https://github.com/kentcdodds/p-s/issues?q=author%3Agunnx) [💻](https://github.com/kentcdodds/p-s/commits?author=gunnx) [⚠️](https://github.com/kentcdodds/p-s/commits?author=gunnx) | [<img src="https://avatars.githubusercontent.com/u/1019478?v=3" width="100px;"/><br /><sub>Joe Martella</sub>](http://martellaj.github.io)<br />[🐛](https://github.com/kentcdodds/p-s/issues?q=author%3Amartellaj) [💻](https://github.com/kentcdodds/p-s/commits?author=martellaj) [⚠️](https://github.com/kentcdodds/p-s/commits?author=martellaj) | [<img src="https://avatars.githubusercontent.com/u/1887854?v=3" width="100px;"/><br /><sub>Martin Segado</sub>](https://github.com/msegado)<br />[📖](https://github.com/kentcdodds/p-s/commits?author=msegado) | [<img src="https://avatars.githubusercontent.com/u/36491?v=3" width="100px;"/><br /><sub>Bram Borggreve</sub>](http://colmena.io/)<br />[🐛](https://github.com/kentcdodds/p-s/issues?q=author%3Abeeman) [💻](https://github.com/kentcdodds/p-s/commits?author=beeman) | [<img src="https://avatars.githubusercontent.com/u/86454?v=3" width="100px;"/><br /><sub>Elijah Manor</sub>](http://elijahmanor.com)<br />📹 | [<img src="https://avatars.githubusercontent.com/u/10691183?v=3" width="100px;"/><br /><sub>Ragu Ramaswamy</sub>](https://github.com/rrag)<br />[💻](https://github.com/kentcdodds/p-s/commits?author=rrag) [⚠️](https://github.com/kentcdodds/p-s/commits?author=rrag) [🐛](https://github.com/kentcdodds/p-s/issues?q=author%3Arrag) |
-| [<img src="https://avatars.githubusercontent.com/u/2915616?v=3" width="100px;"/><br /><sub>Erik Fox</sub>](http://www.erikfox.co/)<br />[🐛](https://github.com/kentcdodds/p-s/issues?q=author%3Aerikfox) | [<img src="https://avatars.githubusercontent.com/u/5351262?v=3" width="100px;"/><br /><sub>Aditya Pratap Singh</sub>](http://blog.adityapsingh.com)<br />👀 | [<img src="https://avatars.githubusercontent.com/u/7687132?v=3" width="100px;"/><br /><sub>bumbleblym</sub>](https://github.com/bumbleblym)<br />[💻](https://github.com/kentcdodds/p-s/commits?author=bumbleblym) [📖](https://github.com/kentcdodds/p-s/commits?author=bumbleblym) | [<img src="https://avatars.githubusercontent.com/u/7091543?v=3" width="100px;"/><br /><sub>Islam Attrash</sub>](https://twitter.com/IslamAttrash)<br />[💻](https://github.com/kentcdodds/p-s/commits?author=Attrash-Islam) | [<img src="https://avatars.githubusercontent.com/u/7215306?v=3" width="100px;"/><br /><sub>JasonSooter</sub>](https://github.com/JasonSooter)<br />[📖](https://github.com/kentcdodds/p-s/commits?author=JasonSooter) |
+| [<img src="https://avatars.githubusercontent.com/u/2915616?v=3" width="100px;"/><br /><sub>Erik Fox</sub>](http://www.erikfox.co/)<br />[🐛](https://github.com/kentcdodds/p-s/issues?q=author%3Aerikfox) | [<img src="https://avatars.githubusercontent.com/u/5351262?v=3" width="100px;"/><br /><sub>Aditya Pratap Singh</sub>](http://blog.adityapsingh.com)<br />👀 | [<img src="https://avatars.githubusercontent.com/u/7687132?v=3" width="100px;"/><br /><sub>bumbleblym</sub>](https://github.com/bumbleblym)<br />[💻](https://github.com/kentcdodds/p-s/commits?author=bumbleblym) [📖](https://github.com/kentcdodds/p-s/commits?author=bumbleblym) | [<img src="https://avatars.githubusercontent.com/u/7091543?v=3" width="100px;"/><br /><sub>Islam Attrash</sub>](https://twitter.com/IslamAttrash)<br />[💻](https://github.com/kentcdodds/p-s/commits?author=Attrash-Islam) | [<img src="https://avatars.githubusercontent.com/u/7215306?v=3" width="100px;"/><br /><sub>JasonSooter</sub>](https://github.com/JasonSooter)<br />[📖](https://github.com/kentcdodds/p-s/commits?author=JasonSooter) | [<img src="https://avatars1.githubusercontent.com/u/116871?v=3" width="100px;"/><br /><sub>Nate Cavanaugh</sub>](http://alterform.com)<br />[💻](https://github.com/kentcdodds/p-s/commits?author=natecavanaugh) |
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors][all-contributors] specification.

src/bin-utils/parser.js

@@ -138,7 +138,7 @@ function parse(rawArgv) {
     function onInit(initArgv) {
       commandExecuted = true
       const path = getPSConfigFilepath(initArgv)
-      const fileExists = Boolean(findUp.sync(path))
+      const fileExists = typeof path === 'string' && Boolean(findUp.sync(path))
       if (fileExists) {
         if (
           !keyInYN(