Updated android build tools version

.travis.yml

@@ -12,7 +12,7 @@ android:
     - extra-google-m2repository
     - extra-android-m2repository
     - addon-google_apis-google-28
-    - build-tools-28.0.2
+    - build-tools-28.0.3
 
 script:
     - ./gradlew test

android/build.gradle

@@ -36,7 +36,7 @@ task deploy(type: Copy){
 }
 
 android {
-    buildToolsVersion '28.0.2'
+    buildToolsVersion '28.0.3'
     compileSdkVersion 28
     sourceSets {
         main {

build.gradle

@@ -9,7 +9,7 @@ buildscript {
     dependencies {
         classpath 'com.mobidevelop.robovm:robovm-gradle-plugin:2.3.0'
         classpath 'de.richsource.gradle.plugins:gwt-gradle-plugin:0.6'
-        classpath 'com.android.tools.build:gradle:3.2.0'
+        classpath 'com.android.tools.build:gradle:3.2.1'
         classpath "com.badlogicgames.gdx:gdx-tools:1.9.8"
     }
 }