优化

优化报错提示；
buildDir 已弃用。 https://docs.gradle.org/current/userguide/upgrading_version_8.html#project_builddir ；
其他优化。

build.gradle

@@ -23,5 +23,5 @@ plugins {
 }
 
 tasks.register('clean', Delete) {
-    delete rootProject.buildDir
+    delete rootProject.layout.buildDirectory
 }