build: set compatibility version

ifedapoolarewaju · ifedapoolarewaju · commit f70e87caabbc · 2017-05-09T09:00:12.000+01:00
diff --git a/build.gradle b/build.gradle
@@ -6,6 +6,9 @@ apply plugin: 'java'
 apply plugin: 'maven'
 apply plugin: 'maven-publish'
 
+sourceCompatibility = 1.6
+targetCompatibility = 1.6
+
 group 'com.transloadit.sdk'
 version = '0.0.1'
 
