version:1.7.0

fix:0918
add:

build.gradle

@@ -1,7 +1,6 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = "1.4.10"
     repositories {
         google()
         jcenter()
@@ -11,7 +10,6 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.6.4'
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
     }
@@ -34,5 +32,5 @@ allprojects {
 }
 
 task clean(type: Delete) {
-    delete rootProject.buildDir
+//    delete rootProject.buildDir
 }