Merge pull request #35 from KarlosQ/patch-1

Use project-wide properties and new dependency

android/build.gradle

+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+        compileSdkVersion safeExtGet('compileSdkVersion', 26)
+        buildToolsVersion safeExtGet('buildToolsVersion', '26.0.3')
 
-    defaultConfig {
-        minSdkVersion 16
-        targetSdkVersion 22
+  defaultConfig {
+        minSdkVersion safeExtGet('minSdkVersion', 16)
+        targetSdkVersion safeExtGet('targetSdkVersion', 26)
         versionCode 1
         versionName "1.0"
         ndk {
@@ -16,5 +20,5 @@ android {
 }
 
 dependencies {
-    compile 'com.facebook.react:react-native:+'
+    implementation 'com.facebook.react:react-native:+'
 }