ci: apply SKIP_PREFLIGHT_CHECK to all commands when deploying example

Author: armand1m

package.json

@@ -54,7 +54,7 @@
     "prepare": "npm run build",
     "semantic-release": "semantic-release",
     "pack:inspect": "yarn pack && tar -ztvf *.tgz",
-    "predeploy-example": "SKIP_PREFLIGHT_CHECK=true cd example && yarn && yarn build",
+    "predeploy-example": "SKIP_PREFLIGHT_CHECK=true $(cd example && yarn && yarn build)",
     "deploy-example": "gh-pages -d example/build"
   },
   "peerDependencies": {