Conflict with dependency ‘com.android.support:support-annotations’ in project ‘:app’解决办法（AS）

从svn上checkout下来的文件，编译的时候遇到了如下问题： Conflict with dependency ‘com.android.support:support-annotations’ in project ‘:app’. Resolved versions for app (27.0.2) and test app (27.1.1) differ. 查了很多资料都没什么卵用，最后找

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