fix: make publish bot run full build, not just tsc (puppeteer#6848)

`npm run tsc` is not enough to do a full build now we also include the
`types.d.ts` file, so we need to run `build.`

package.json

@@ -18,7 +18,7 @@
     "funit": "PUPPETEER_PRODUCT=firefox npm run unit",
     "test": "npm run tsc && npm run lint --silent && npm run unit-with-coverage && npm run test-browser",
     "prepare": "node typescript-if-required.js",
-    "prepublishOnly": "npm run tsc",
+    "prepublishOnly": "npm run build",
     "dev-install": "npm run tsc && node install.js",
     "install": "node install.js",
     "eslint": "([ \"$CI\" = true ] && eslint --ext js --ext ts --quiet -f codeframe . || eslint --ext js --ext ts .)",