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/deepmerge/rollup.config.js

@@ -0,0 +1,22 @@
+import resolve from 'rollup-plugin-node-resolve'
+import commonjs from 'rollup-plugin-commonjs'
+import pkg from './package.json'
+
+export default {
+	input: `index.js`,
+	plugins: [
+		commonjs(),
+		resolve(),
+	],
+	output: [
+		{
+			file: pkg.main,
+			format: `cjs`
+		},
+		{
+			name: 'deepmerge',
+			file: 'dist/umd.js',
+			format: `umd`
+		},
+	],
+}