chore: don't publish grammar definition file

Move file out of the src directory so it does not get published.

Author: ludofischer

package.json

@@ -18,7 +18,7 @@
   ],
   "scripts": {
     "prepare": "pnpm run build && tsc",
-    "build": "jison src/parser.jison -o src/parser.js",
+    "build": "jison ./parser.jison -o src/parser.js",
     "lint": "eslint . && tsc",
     "test": "uvu test"
   },