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/nice-try/README.md

@@ -0,0 +1,32 @@
+# nice-try
+
+[![Travis Build Status](https://travis-ci.org/electerious/nice-try.svg?branch=master)](https://travis-ci.org/electerious/nice-try) [![AppVeyor Status](https://ci.appveyor.com/api/projects/status/8tqb09wrwci3xf8l?svg=true)](https://ci.appveyor.com/project/electerious/nice-try) [![Coverage Status](https://coveralls.io/repos/github/electerious/nice-try/badge.svg?branch=master)](https://coveralls.io/github/electerious/nice-try?branch=master) [![Dependencies](https://david-dm.org/electerious/nice-try.svg)](https://david-dm.org/electerious/nice-try#info=dependencies) [![Greenkeeper badge](https://badges.greenkeeper.io/electerious/nice-try.svg)](https://greenkeeper.io/)
+
+A function that tries to execute a function and discards any error that occurs.
+
+## Install
+
+```
+npm install nice-try
+```
+
+## Usage
+
+```js
+const niceTry = require('nice-try')
+
+niceTry(() => JSON.parse('true')) // true
+niceTry(() => JSON.parse('truee')) // undefined
+niceTry() // undefined
+niceTry(true) // undefined
+```
+
+## API
+
+### Parameters
+
+- `fn` `{Function}` Function that might or might not throw an error.
+
+### Returns
+
+- `{?*}` Return-value of the function when no error occurred.