Rolledup Output (#12)

* Use Rollup to bundle the plugin
* Testing uses the CJS output of TS, build uses the ES output
* Ensure build of plugin in dist per push

Author: kristoferbaxter

.gitignore

@@ -1,4 +1,6 @@
 node_modules/*
 yarn-error.log
 .vscode/*
-.DS_Store
+.DS_Store
+dist/
+transpile/