feat: add coverage metrics to our output when we test locally

Author: Victor Wiebe

package.json

@@ -15,7 +15,7 @@
     "dist/**/*"
   ],
   "scripts": {
-    "test": "jest",
+    "test": "jest --coverage",
     "build:ts": "ttsc -b --watch",
     "build:dev": "webpack --mode development --display-error-details",
     "build:prod": "webpack --mode production && ttsc -b",