updating target version to 30, Android R

app/build.gradle

@@ -9,13 +9,12 @@ if (keystorePropertiesFile.exists()) {
 }
 
 android {
-    compileSdkVersion 29
-    buildToolsVersion '29.0.3'
+    compileSdkVersion 30
 
     defaultConfig {
         applicationId "com.simplemobiletools.calculator"
         minSdkVersion 21
-        targetSdkVersion 29
+        targetSdkVersion 30
         versionCode 34
         versionName "5.2.0"
         setProperty("archivesBaseName", "calculator")
@@ -58,14 +57,14 @@ android {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:5.28.23'
+    implementation 'com.simplemobiletools:commons:5.30.0'
     implementation 'me.grantland:autofittextview:0.2.1'
 
     testImplementation 'junit:junit:4.12'
-    testImplementation 'org.robolectric:robolectric:3.8'
+    testImplementation 'org.robolectric:robolectric:4.2'
 
-    androidTestImplementation 'androidx.annotation:annotation:1.0.0'
-    androidTestImplementation 'androidx.test:runner:1.1.0-beta02'
-    androidTestImplementation 'androidx.test:rules:1.1.0-beta02'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-beta02'
+    androidTestImplementation 'androidx.annotation:annotation:1.1.0'
+    androidTestImplementation 'androidx.test:runner:1.3.0-rc03'
+    androidTestImplementation 'androidx.test:rules:1.3.0-rc03'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0-rc03'
 }

build.gradle

@@ -1,14 +1,14 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.3.72'
+    ext.kotlin_version = '1.4.0'
     repositories {
         google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.6.3'
+        classpath 'com.android.tools.build:gradle:4.0.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Sun Mar 22 09:38:48 CET 2020
+#Mon Aug 17 22:55:20 CEST 2020
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.4-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip