Updated Gradle to version 6,

Updated android target api to 29.

Author: hojjatjafary

JavaPlugin/build.gradle

@@ -1,15 +1,17 @@
 
 buildscript {
     repositories {
-        jcenter()
+        google()
+		jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:1.2.3'
+        classpath 'com.android.tools.build:gradle:3.5.2'
     }
 }
 
 allprojects {
     repositories {
+		google()
         jcenter()
     }
 }
@@ -18,12 +20,12 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 21
-    buildToolsVersion "23.0.3"
+    compileSdkVersion 29
+    buildToolsVersion "29.0.2"
 
     defaultConfig {
         minSdkVersion 9
-        targetSdkVersion 21
+        targetSdkVersion 29
         versionCode 1
         versionName "1.0"
     }
@@ -42,15 +44,15 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+    api fileTree(dir: 'libs', include: ['*.jar'])
 }
 
 task deleteJar(type : Delete){
     delete 'BazaarIAB.jar'
 }
 
 task createJar(type : Copy){
-    from ('build/intermediates/bundles/release/')
+    from ('build/intermediates/packaged-classes/release/')
     into ('build')
     include ('classes.jar')
     rename ('classes.jar','BazaarIAB.jar')

JavaPlugin/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.0.1-all.zip