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/add.js

@@ -0,0 +1,46 @@
+module.exports = addHook
+
+function addHook (state, kind, name, hook) {
+  var orig = hook
+  if (!state.registry[name]) {
+    state.registry[name] = []
+  }
+
+  if (kind === 'before') {
+    hook = function (method, options) {
+      return Promise.resolve()
+        .then(orig.bind(null, options))
+        .then(method.bind(null, options))
+    }
+  }
+
+  if (kind === 'after') {
+    hook = function (method, options) {
+      var result
+      return Promise.resolve()
+        .then(method.bind(null, options))
+        .then(function (result_) {
+          result = result_
+          return orig(result, options)
+        })
+        .then(function () {
+          return result
+        })
+    }
+  }
+
+  if (kind === 'error') {
+    hook = function (method, options) {
+      return Promise.resolve()
+        .then(method.bind(null, options))
+        .catch(function (error) {
+          return orig(error, options)
+        })
+    }
+  }
+
+  state.registry[name].push({
+    hook: hook,
+    orig: orig
+  })
+}