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/before-after-hook/lib/register.js

@@ -0,0 +1,28 @@
+module.exports = register
+
+function register (state, name, method, options) {
+  if (typeof method !== 'function') {
+    throw new Error('method for before hook must be a function')
+  }
+
+  if (!options) {
+    options = {}
+  }
+
+  if (Array.isArray(name)) {
+    return name.reverse().reduce(function (callback, name) {
+      return register.bind(null, state, name, callback, options)
+    }, method)()
+  }
+
+  return Promise.resolve()
+    .then(function () {
+      if (!state.registry[name]) {
+        return method(options)
+      }
+
+      return (state.registry[name]).reduce(function (method, registered) {
+        return registered.hook.bind(null, method, options)
+      }, method)()
+    })
+}