android 依赖完善

flutter/flutter/android/build.gradle

-package android
-
 buildscript {
     repositories {
         google()
@@ -12,6 +10,7 @@ buildscript {
 }
 
 apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
 
 android {
     compileSdkVersion 30
@@ -20,7 +19,7 @@ android {
         minSdkVersion 24
         targetSdkVersion 30
         versionCode 451
-        versionName "4.5.1"
+        versionName "5.1.1"
     }
 
     buildTypes {