rxjava README: fix dependency config.

greenrobot-team · greenrobot-team · commit 5504c71b004a · 2018-07-30T08:05:28.000+02:00
diff --git a/objectbox-rxjava/README.md b/objectbox-rxjava/README.md
@@ -21,7 +21,7 @@ Adding the library to your project
 -----------------
 Grab via Gradle:
 ```gradle
-compile 'io.objectbox:objectbox-rxjava:objectboxVersion'
+implementation "io.objectbox:objectbox-rxjava:$objectboxVersion"
 ```
 
 Links
