These commits add OnLongClick for tags, and upgraded to Android X#156

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Commits on Jul 20, 2019

修改最低版本14编译版本29，修改Support为AndroidX，修改gradle为5.1.1和3.4.2
zhiqiang3927
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Commits on Jul 22, 2019

修改TagView为FlowTagView，添加标签长按点击的监听
 zhiqiang3927
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