Update gradle tooling & gsantner-opoc

build.gradle

@@ -7,37 +7,40 @@
  *     https://www.apache.org/licenses/LICENSE-2.0
  *
 #########################################################*/
-import java.text.SimpleDateFormat
-
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
-buildscript {
-    ext.version_setup_compileSdk = 27
-    ext.version_setup_minSdk = 17
-    ext.version_setup_targetSdk = ext.version_setup_compileSdk
-    ext.version_setup_buildTools = "27.0.3" // Specifying optional
+import java.text.SimpleDateFormat
 
-    // https://developer.android.com/studio/releases/gradle-plugin.html
-    ext.version_gradle_tools = "3.1.0"
-    // https://developer.android.com/topic/libraries/support-library/revisions.html
-    ext.version_library_appcompat = "27.1.1"
-    // https://github.com/JakeWharton/butterknife/releases
-    ext.version_library_butterknife = "8.8.1"
-    // https://github.com/guardianproject/NetCipher/releases
-    ext.version_library_netcipher = "2.0.0-alpha1"
-    // https://mvnrepository.com/artifact/org.jetbrains.kotlin/kotlin-gradle-plugin#LookAtCentral
-    ext.version_plugin_kotlin = "1.2.21"
-    ext.enable_plugin_kotlin = false
+buildscript {
+    ext {
+        version_gradle_tools = "3.2.1"
+        version_plugin_kotlin = "1.3.11"
+        enable_plugin_kotlin = false
+
+        version_compileSdk = 28
+        version_buildTools = "28.0.3"
+        version_minSdk = 17
+
+        // https://developer.android.com/topic/libraries/support-library/
+        version_library_appcompat = "28.0.0" //androidx
+        // https://github.com/JakeWharton/butterknife/releases
+        version_library_butterknife = "8.8.1" //9.0.0-rc2
+        // https://github.com/guardianproject/NetCipher/releases
+        version_library_netcipher = "2.0.0-alpha1"
+    }
 
     repositories {
-        google()
+        maven { url 'https://maven.google.com' }
         jcenter()
+        maven { url "https://jitpack.io" }
+        mavenCentral()
     }
+
     dependencies {
-        classpath "com.android.tools.build:gradle:$version_gradle_tools"
-        classpath 'com.github.dcendents:android-maven-gradle-plugin:1.5'
+        classpath "com.android.tools.build:gradle:${version_gradle_tools}"
+        classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
         if (project.enable_plugin_kotlin) {
-            classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$version_plugin_kotlin"
+            classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${version_plugin_kotlin}"
         }
 
         // NOTE: Do not place your application dependencies here; they belong
@@ -47,10 +50,10 @@ buildscript {
 
 allprojects {
     repositories {
-        google()
+        maven { url 'https://maven.google.com' }
         jcenter()
-        mavenCentral()
         maven { url "https://jitpack.io" }
+        mavenCentral()
     }
 
     tasks.matching { task -> task.name.matches('.*generate.*Resources') }.all {
@@ -99,6 +102,7 @@ ext.getGitHash = { ->
         return 'unknown'
     }
 }
+
 @SuppressWarnings(["UnnecessaryQualifiedReference", "SpellCheckingInspection", "GroovyUnusedDeclaration"])
 // Returns the build date in a RFC3339 compatible format. TZ is always converted to UTC
 static String getBuildDate() {