release: Update publish config and publish v0.0.1 (#109)

* chore: Add prepublishOnly script to manage wombat login

Add a prepublishOnly script, that will be invoked when npm publish
is run, to run npm login.

For some reason npm login does not by default use the same
repository as npm publish does, so it's necessary to specify
the repo URL explicitly.  ಠ_ಠ

* release: Publish v0.0.1 to npm.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@blockly/keyboard-experiment",
-  "version": "0.0.0",
+  "version": "0.0.1",
   "description": "A plugin for keyboard navigation.",
   "scripts": {
     "audit:fix": "blockly-scripts auditFix",
@@ -10,6 +10,7 @@
     "lint": "eslint .",
     "format": "prettier --write .",
     "predeploy": "blockly-scripts predeploy",
+    "prepublishOnly": "npm login --registry https://wombat-dressing-room.appspot.com",
     "start": "blockly-scripts start",
     "test": "blockly-scripts test"
   },