update appcompat version

app/build.gradle

@@ -57,8 +57,6 @@ dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "androidx.appcompat:appcompat:$rootProject.appcompatVersion"
     implementation "androidx.recyclerview:recyclerview:$rootProject.recyclerviewVersion"
-    implementation "androidx.appcompat:appcompat:$rootProject.appcompatVersion"
-    testImplementation 'junit:junit:4.12'
     implementation project(':Live')
     implementation "androidx.core:core-ktx:$rootProject.core_ktx"
     implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$rootProject.lifecycle_ktx"

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.4.21'
+    ext.kotlin_version = '1.3.50'
     repositories {
         jcenter()
         maven {

gradle.properties

@@ -19,11 +19,11 @@ org.gradle.jvmargs=-Xmx512m
 android.enableJetifier=true
 android.useAndroidX=true
 
-appcompatVersion=1.2.0
-recyclerviewVersion=1.1.0-rc01
+appcompatVersion=1.3.0
+recyclerviewVersion=1.2.1
 preferenceVersion=1.1.0
 annotationVersion=1.1.0
 ottoVersion=1.3.8
 ijkVersion=0.8.8
-core_ktx=1.3.2
-lifecycle_ktx=2.2.0
+core_ktx=1.5.0
+lifecycle_ktx=2.3.1