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/os-name/index.d.ts

@@ -0,0 +1,37 @@
+/// <reference types="node"/>
+
+/**
+Get the name of the current operating system.
+
+By default, the name of the current operating system is returned.
+
+@param platform - Custom platform name.
+@param release - Custom release name.
+
+@example
+```
+import * as os fron 'os';
+import osName = require('os-name');
+
+// On a macOS Sierra system
+
+osName();
+//=> 'macOS Sierra'
+
+osName(os.platform(), os.release());
+//=> 'macOS Sierra'
+
+osName('darwin', '14.0.0');
+//=> 'OS X Yosemite'
+
+osName('linux', '3.13.0-24-generic');
+//=> 'Linux 3.13'
+
+osName('win32', '6.3.9600');
+//=> 'Windows 8.1'
+```
+*/
+declare function osName(): string;
+declare function osName(platform: NodeJS.Platform, release: string): string;
+
+export = osName;