升级完flutter版本后，打包ios上传苹果市场，遇到这个问题
ERROR ITMS-90208: "Invalid Bundle. The bundle Runner.app/Frameworks/App.framework does not support the minimum OS Version specified in the Info.plist."
百度无果后，只能google，在github上看到外国友人的解决方法，
After doing a flutter clean, changing MinimumOSVersion (inside /ios/Flutter/AppframeworkInfo.plist) to 9.0, iOS Deployment Target (inside project runner) to 9.0 and iOS Deployment Target (inside target runner) to 9.0 the error disappeared.
做下记录，希望能给遇到同样问题的小伙伴提供帮助，也避免下次遇到，要花很多时间去解决
