chore: removes npm-run-all (#1453)

Author: amuramoto

package.json

@@ -23,7 +23,7 @@
     "build:esbuild": "esbuild src/playground/index.ts src/playground/resizer.ts --splitting --target=es2020 --legal-comments=linked --bundle --format=esm --minify --outdir=dist",
     "build:worker": "esbuild ./node_modules/playground-elements/playground-typescript-worker.js --platform=node --legal-comments=linked --bundle --minify --outfile=dist/playground-typescript-worker.js",
     "build:tailwind": "tailwindcss -i ./src/playground/style.css -o ./dist/samples/playground.css --minify",
-    "build": "npm-run-all clean -p build:*",
+    "build": "npm run clean && npm run build:eleventy && npm run build:esbuild && npm run build:worker && npm run build:tailwind",
     "ci": "npm run build && npm run test",
     "clean": "npx rimraf dist/*",
     "clean:cache": "npx rimraf .cache/* ./parcel-cache/*",