Add auth support (#21)

* Updates

* Update

* Update

* Update

* Update

* Yarn sometimes prefers npmrc, so use same token

* Description

* Update readme

* Feedback

* Add type

* new toolkit and scoped registries

* npmrc in RUNNER_TEMP

* Dont always auth

* Try exporting blank token

* Get auth working for now pending runner changes

* Fix string interpolation for auth token.

* Don't export both userconfigs

* Update authutil.js

* Add single quotes for authString

* Fix the registry string.

* Use userconfig and append trailing slash

* Keep in root of repo

* Try just adding auth token

* Remove auth token

* Try changes again

* Add tests

* Npm and GPR samples

* Add types

node_modules/p-finally/readme.md

@@ -0,0 +1,47 @@
+# p-finally [![Build Status](https://travis-ci.org/sindresorhus/p-finally.svg?branch=master)](https://travis-ci.org/sindresorhus/p-finally)
+
+> [`Promise#finally()`](https://github.com/tc39/proposal-promise-finally) [ponyfill](https://ponyfill.com) - Invoked when the promise is settled regardless of outcome
+
+Useful for cleanup.
+
+
+## Install
+
+```
+$ npm install --save p-finally
+```
+
+
+## Usage
+
+```js
+const pFinally = require('p-finally');
+
+const dir = createTempDir();
+
+pFinally(write(dir), () => cleanup(dir));
+```
+
+
+## API
+
+### pFinally(promise, [onFinally])
+
+Returns a `Promise`.
+
+#### onFinally
+
+Type: `Function`
+
+Note: Throwing or returning a rejected promise will reject `promise` with the rejection reason.
+
+
+## Related
+
+- [p-try](https://github.com/sindresorhus/p-try) - `Promise#try()` ponyfill - Starts a promise chain
+- [More…](https://github.com/sindresorhus/promise-fun)
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)