package.json: add format check to "npm run check"

Author: dsp-ant

package.json

@@ -7,7 +7,7 @@
     "build": "tsc",
     "validate": "npx ts-node scripts/validate-config.ts",
     "test": "npx ts-node scripts/test-config.ts",
-    "check": "npm run validate && npm run test",
+    "check": "npm run format:check && npm run validate && npm run test",
     "format": "prettier --write .",
     "format:check": "prettier --check ."
   },