Fixed release build error in RN 56.0+

.gitignore

@@ -29,6 +29,7 @@ build/
 .gradle
 local.properties
 *.iml
+.history
 
 # node.js
 #

android/build.gradle

@@ -1,23 +1,27 @@
 apply plugin: "com.android.library"
 
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
 android {
-    compileSdkVersion 25
-    buildToolsVersion "25.0.1"
+    compileSdkVersion safeExtGet("compileSdkVersion", 25)
+    buildToolsVersion safeExtGet("buildToolsVersion", "25.0.1")
 
     defaultConfig {
-        minSdkVersion 16
-        targetSdkVersion 23
+        minSdkVersion safeExtGet("minSdkVersion", 16)
+        targetSdkVersion safeExtGet("targetSdkVersion", 23)
         versionCode 1
         versionName "1.0"
     }
 }
 
 dependencies {
-    compile "com.facebook.react:react-native:+"  // From node_modules
-    compile 'com.android.support:customtabs:25.0.1'
-    compile ('com.github.droibit.customtabslauncher:launcher:1.0.8') {
+    implementation "com.facebook.react:react-native:${safeExtGet('reactNativeVersion', '+')}"
+    implementation 'com.android.support:customtabs:25.0.1'
+    implementation ('com.github.droibit.customtabslauncher:launcher:1.0.8') {
         exclude module: 'customtabs'
     }
 
-    testCompile 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.12'
 }

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-native-custom-tabs",
-  "version": "0.1.7",
+  "version": "0.1.8",
   "description": "Chrome Custom Tabs for React Native.",
   "keywords": [
     "react-native",