Support for RN 0.56 and Android O+

Author: Eugnis

android/build.gradle

@@ -1,12 +1,12 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    compileSdkVersion 26
+    buildToolsVersion "26.0.3"
 
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 23
+        targetSdkVersion 26
         versionCode 1
         versionName "1.0"
         ndk {
@@ -26,6 +26,7 @@ dependencies {
     compile 'com.facebook.react:react-native:+'
     compile 'com.google.android.gms:play-services-gcm:9.4.0'
     compile 'com.google.firebase:firebase-messaging:9.4.0'
+    compile 'com.android.support:appcompat-v7:26.0.+'
     compile 'com.microsoft.azure:notification-hubs-android-sdk:0.4@aar'
     compile 'com.microsoft.azure:azure-notifications-handler:1.0.1@aar'
 }