fix(package): audit cleanup and peer dependencies

BREAKING CHANGE: Babylon.js and loaders are now peer dependencies. Add `@babylonjs/core` and
`@babylonjs/loaders` when using this package from npm.

closes #21

package.json

@@ -56,8 +56,8 @@
     "@babylonjs/loaders": "^4.0.3",
     "@vue/test-utils": "^1.0.0-beta.25",
     "ava": "^2.0.0",
-    "begin-build": "^0.16.14",
-    "begin-project": "^0.4.0",
+    "begin-build": "^0.16.15",
+    "begin-project": "^0.4.3",
     "cannon": "^0.6.2",
     "earcut": "^2.1.3",
     "eslint-plugin-vue": "^5.0.0-beta.3",