feat: bump android kotlin and build tools versions

Author: reime005

android/build.gradle

@@ -1,7 +1,7 @@
 buildscript {
     ext {
-        kotlinVersion = '1.3.10'
-        buildToolsVersion = '29.0.0'
+        kotlinVersion = '1.3.41'
+        buildToolsVersion = '29.0.2'
         compileSdkVersion = 29
         targetSdkVersion = 29
         minSdkVersion = 18
@@ -13,7 +13,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.2'
+        classpath 'com.android.tools.build:gradle:3.5.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
     }
 }
@@ -22,9 +22,9 @@ apply plugin: 'com.android.library'
 apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 
-def DEFAULT_COMPILE_SDK_VERSION = 27
-def DEFAULT_BUILD_TOOLS_VERSION = "27.0.3"
-def DEFAULT_TARGET_SDK_VERSION = 27
+def DEFAULT_COMPILE_SDK_VERSION = 28
+def DEFAULT_BUILD_TOOLS_VERSION = "28.0.3"
+def DEFAULT_TARGET_SDK_VERSION = 28
 
 android {
     compileSdkVersion project.hasProperty('compileSdkVersion') ? project.compileSdkVersion : DEFAULT_COMPILE_SDK_VERSION