Update example app

Update gradle files, nothing fancy.

android/build.gradle

@@ -2,7 +2,7 @@ apply plugin: 'com.android.library'
 
 android {
     compileSdkVersion 27
-    buildToolsVersion "27.0.3"
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         minSdkVersion 19

example/android/build.gradle

@@ -2,15 +2,21 @@
 
 buildscript {
     repositories {
+        google()
+        mavenLocal()
+        mavenCentral()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:2.2.0'
+        classpath 'com.android.tools.build:gradle:3.2.1'
     }
 }
 
 allprojects {
     repositories {
+        mavenLocal()
+        mavenCentral()
+        google()
         jcenter()
 
         maven {

example/android/gradle/wrapper/gradle-wrapper.properties

-#Sun Oct 09 14:30:04 IDT 2016
+#Sun Nov 04 14:31:28 IST 2018
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.14.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

example/android/myapplication/build.gradle

 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "25"
+    compileSdkVersion 26
+    buildToolsVersion "28.0.3"
 
     defaultConfig {
         applicationId "com.wix.reactnativenotifications.app"
-        minSdkVersion 16
-        targetSdkVersion 23
+        minSdkVersion 19
+        targetSdkVersion 26
         versionCode 1
         versionName "1.0"
 
         ndk {
             abiFilters "armeabi-v7a", "x86"
         }
-//        packagingOptions {
-//            exclude "lib/arm64-v8a/librealm-jni.so"
-//        }
     }
     buildTypes {
         release {
@@ -27,12 +24,12 @@ android {
 }
 
 dependencies {
-    compile fileTree(dir: 'libs', include: ['*.jar'])
+//    compile fileTree(dir: 'libs', include: ['*.jar'])
 
-    compile 'com.android.support:appcompat-v7:23.4.0'
-    compile 'com.android.support:design:23.4.0'
-    compile 'com.facebook.react:react-native:+'
-    compile project(':react-native-notifications')
+    implementation 'com.android.support:appcompat-v7:26.1.0'
+    implementation 'com.android.support:design:26.1.0'
+    implementation 'com.facebook.react:react-native:+'
+    implementation project(':react-native-notifications')
 
-    testCompile 'junit:junit:4.12'
+    testImplementation'junit:junit:4.12'
 }

example/package.json

@@ -12,6 +12,8 @@
     "react-native-notifications": "../"
   },
   "babel": {
-    "presets": ["react-native-stage-0"]
+    "presets": [
+      "react-native-stage-0"
+    ]
   }
 }