chore: add prerelease script

Author: gregberge

package.json

@@ -8,6 +8,7 @@
     "dev": "WATCH_MODE=true lerna run build --parallel -- --watch",
     "format": "prettier --write \"**/*.{js,json,md}\"",
     "lint": "eslint .",
+    "prerelease": "lerna publish prerelease",
     "release": "lerna publish --conventional-commits && conventional-github-releaser --preset angular",
     "test": "jest"
   },