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/strip-eof/readme.md

@@ -0,0 +1,28 @@
+# strip-eof [![Build Status](https://travis-ci.org/sindresorhus/strip-eof.svg?branch=master)](https://travis-ci.org/sindresorhus/strip-eof)
+
+> Strip the [End-Of-File](https://en.wikipedia.org/wiki/End-of-file) (EOF) character from a string/buffer
+
+
+## Install
+
+```
+$ npm install --save strip-eof
+```
+
+
+## Usage
+
+```js
+const stripEof = require('strip-eof');
+
+stripEof('foo\nbar\n\n');
+//=> 'foo\nbar\n'
+
+stripEof(new Buffer('foo\nbar\n\n')).toString();
+//=> 'foo\nbar\n'
+```
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)