Add sonicDependenciesReverseTree to README.md

Author: Anton Troshin

README.md

@@ -17,7 +17,7 @@ Add the plugin as SBT dependency to your `project/plugins.sbt`
 ```
 resolvers += Resolver.bintrayRepo("ironsonic", "sbt-plugins")
 
-addSbtPlugin("com.supersonic" % "sonic-dependency-tree" % "0.0.2")
+addSbtPlugin("com.supersonic" % "sonic-dependency-tree" % "0.0.3")
 ```
 
 Since it is an Auto Plugin, no need to explicitly enable it.
@@ -65,6 +65,8 @@ sonicDependenciesUploadFilename in Global := "dependencies.json"
     - Prints dependency list with commit as JSON Array
 - `sonicDependenciesUploadToS3` : `Task` 
     - Upload full dependency tree to S3
+- `sonicDependenciesReverseTree` : `Task`
+    - Print reverse dependencies tree for a project
 
 
 ## S3 configuration