Release 2.8.0 - Update Kt, Gradle and AGP

- Update to latest Kotlin version
- Update to latest AGP and Gradle versions
- Remove the android.buildToolsVersion property, the plugin uses the minimum required version by default

Related to DEP-266

Author: mircea-yoti

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 = '1.5.10'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
         jcenter()
 
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.2.2'
+        classpath 'com.android.tools.build:gradle:7.1.2'
         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

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-all.zip

webapp/build.gradle

@@ -4,7 +4,6 @@ apply plugin: 'kotlin-android-extensions'
 
 android {
     compileSdkVersion 29
-    buildToolsVersion "29.0.3"
 
     defaultConfig {
         applicationId "com.yoti.mobile.android.sdk.yotidocscan.websample"