Update with latests changes provided by Google including a switch to … (#270)

* Update with latests changes provided by Google including a switch to having the project setup as a provider

* Add a bit of additional functionality

* Fix test

* Add support from #279 for custom base sha

* Fix test failing

Author: joshafeinberg

affectedmoduledetector/src/main/kotlin/com/dropbox/affectedmoduledetector/AffectedModuleConfiguration.kt

@@ -2,8 +2,9 @@ package com.dropbox.affectedmoduledetector
 
 import com.dropbox.affectedmoduledetector.util.toOsSpecificPath
 import java.io.File
+import java.io.Serializable
 
-class AffectedModuleConfiguration {
+class AffectedModuleConfiguration : Serializable {
 
     /**
      * Implementation of [AffectedModuleTaskType] for easy adding of custom gradle task to