TfxExtensionCreate.txt

tfx extension create --manifest-globs vss-extension.json 
tfx extension create --rev-version --manifest-globs vss-extension.json

//An extension/integration's version must be incremented on every update. 
//If you haven't incremented your extension/integration in the manifest, you should pass the --rev-version command line switch.
//This will increment the patch version number of your extension and save the new version to your manifest.