Update README.md to point to 4.7
diff --git a/README.md b/README.md
index a95c163..c2d48b3 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@
 #### build.gradle:
 
 ```groovy
-testImplementation "org.robolectric:robolectric:4.6.1"
+testImplementation "org.robolectric:robolectric:4.7"
 ```
 
 ## Building And Contributing