Change versionCode/versionName when running with --release

Hi,

I've been building-beta releasing-building-beta releasing an Android app for a couple of days now. Pretty much every time I build it I forget to update the versionCode and versionName in the AndroidManifest.xml. I get reminded of this then Google's Developer Console rejects my APK because of the versionCode not being larger than the previous version.

An easy way to make a little bit easier for the developers would be to add a prompt for versionCode/versionName in the CLI if the build is run with the --release flag. And let the predefined value be read from the current AndroidManifest.xml. This way the developer will be reminded to update the versionCode/versionName and if s/he doesn't want to it's just an enter stroke away.

If versionCode/versionName is changed then write it back to the AndroidManifest.xml

As tns build could be a part of a larger build script where user input is not possible, a new flag, such as --auto or --quiet, should probably be added as well - skipping the prompt.

首先追蹤使用 --release 時的 tns build 流程，並檢查 AndroidManifest.xml 的讀取與更新方式。當 release 建置能夠使用 manifest 中的值進行提示、持久化變更後的 versionCode/versionName 值，並支援如 --auto 或 --quiet 這樣的非互動式旗標時，即可視為完成。