Could not find any version that matches com.android.support:appcompat-v7:29.+.

创建工程时，出现这两个错误，一顿百度下来，已解决，特此记录一下，参考如下链接
第一个问题
https://blog.****.net/ZFY11/article/details/94390570
第二个问题
http://www.suoniao.com/article/5e61c03f6d2df126701c4768

Unable to resolve dependency for ‘:[email protected]/compileClasspath’: Could not find any version that matches com.android.support:appcompat-v7:29.+.
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Unable to resolve dependency for ‘:[email protected]/compileClasspath’: Could not find any version that matches com.android.support:design:29.+.
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第一个问题 v7:29.+ 改为 v7:+

第二个问题 ，默认都是29，改为28即可