android:attr/fontVariationSettings not found 和 android:attr/ttcIndex not found

报错信息：

* What went wrong:
Execution failed for task ':thumbnails:verifyReleaseResources'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > 1 exception was raised by workers:
     com.android.builder.internal.aapt.v2.Aapt2Exception: Android resource linking failed
     C:\Users\hackerpl\.gradle\caches\transforms-2\files-2.1\2cfc6de18491d78868ffdd6cc499684d\core-1.1.0\res\values\values.xml:142:5-173:25: AAPT: error: resource android:attr/fontVariationSettings not found.

     C:\Users\hackerpl\.gradle\caches\transforms-2\files-2.1\2cfc6de18491d78868ffdd6cc499684d\core-1.1.0\res\values\values.xml:142:5-173:25: AAPT: error: resource android:attr/ttcIndex not found.

有效解决方案：

注意这一行：Execution failed for task ':thumbnails:verifyReleaseResources'. 很明显，是我的thumbnails插件出问题了，再结合网上看到的，修改thumbnails插件的build.gradle文件为sdk28+版本即可