Updates for latest gradle/build tools

Ref GH-504.

test/app/build.gradle

@@ -19,16 +19,18 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 27
-    buildToolsVersion "27.0.1"
+    compileSdkVersion 28
+    buildToolsVersion "28.0.3"
+
     defaultConfig {
         applicationId "org.apache.cordova.unittests"
         minSdkVersion 19
-        targetSdkVersion 27
+        targetSdkVersion 28
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
+
     buildTypes {
         release {
             minifyEnabled false

test/build.gradle

@@ -23,11 +23,12 @@ buildscript {
         google()
         jcenter()
     }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.1'
 
+    dependencies {
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
+
+        classpath 'com.android.tools.build:gradle:3.2.0'
     }
 }
 

test/wrapper.gradle

@@ -1,3 +1,3 @@
 wrapper {
-    gradleVersion = '4.4.1'
+    gradleVersion = '4.6'
 }