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/macos-release/index.d.ts

@@ -0,0 +1,36 @@
+declare const macosRelease: {
+	/**
+	Get the name and version of a macOS release from the Darwin version.
+
+	@param release - By default, the current operating system is used, but you can supply a custom [Darwin kernel version](http://en.wikipedia.org/wiki/Darwin_%28operating_system%29#Release_history), which is the output of [`os.release()`](https://nodejs.org/api/os.html#os_os_release).
+
+	@example
+	```
+	import * as os from 'os';
+	import macosRelease = require('macos-release');
+
+	// On a macOS Sierra system
+
+	macosRelease();
+	//=> {name: 'Sierra', version: '10.12'}
+
+	os.release();
+	//=> 13.2.0
+	// This is the Darwin kernel version
+
+	macosRelease(os.release());
+	//=> {name: 'Sierra', version: '10.12'}
+
+	macosRelease('14.0.0');
+	//=> {name: 'Yosemite', version: '10.10'}
+	```
+	*/
+	(release?: string): string;
+
+	// TODO: remove this in the next major version, refactor the whole definition to:
+	// declare function macosRelease(release?: string): string;
+	// export = macosRelease;
+	default: typeof macosRelease;
+};
+
+export = macosRelease;