Alex Chen

Version update notification

3

## new feature: Version update notification add a file "/src/react/components/common/version-info.json" like this: ` { "tag":"ga", "versions": { "ga": { "version": "2.0.0", "date":"2020-06-11", "commit": "b148092" }, "preview": { "version": "2.1", "date":"2020-09-15",...