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/is-stream/index.js

@@ -0,0 +1,21 @@
+'use strict';
+
+var isStream = module.exports = function (stream) {
+	return stream !== null && typeof stream === 'object' && typeof stream.pipe === 'function';
+};
+
+isStream.writable = function (stream) {
+	return isStream(stream) && stream.writable !== false && typeof stream._write === 'function' && typeof stream._writableState === 'object';
+};
+
+isStream.readable = function (stream) {
+	return isStream(stream) && stream.readable !== false && typeof stream._read === 'function' && typeof stream._readableState === 'object';
+};
+
+isStream.duplex = function (stream) {
+	return isStream.writable(stream) && isStream.readable(stream);
+};
+
+isStream.transform = function (stream) {
+	return isStream.duplex(stream) && typeof stream._transform === 'function' && typeof stream._transformState === 'object';
+};