Updated readme

Author: Rolf-Smit

README.md

@@ -52,11 +52,14 @@ Android-Retainable-Tasks is available on jcenter just like many other Android/Ja
 
 ```groovy
 dependencies {
-    // The library dependency
-    compile 'org.neotech.library:android-retainable-tasks:1.0.0-rc-2'
+    // Gradle < 3.0
+    compile 'org.neotech.library:android-retainable-tasks:1.0.0-rc-3'
     
-    // Needed if you want to use annotations
-    annotationProcessor 'org.neotech.library:android-retainable-tasks-compiler:1.0.0-rc-2'
+    // Gradle >= 3.0
+    implementation 'org.neotech.library:android-retainable-tasks:1.0.0-rc-3'
+    
+    // Needed if you want to use annotations (all Gradle versions)
+    annotationProcessor 'org.neotech.library:android-retainable-tasks-compiler:1.0.0-rc-3'
 }
 ```