build.gradle in embulk-output-gcs-0.4.1 vs build.gradle in embulk-output-gcs-0.4.2

@@ -12,13 +12,13 @@
 }
 configurations {
     provided
 }
 
-sourceCompatibility = 1.7
-targetCompatibility = 1.7
+sourceCompatibility = 1.8
+targetCompatibility = 1.8
 
-version = "0.4.1"
+version = "0.4.2"
 
 dependencies {
     compile  "org.embulk:embulk-core:0.8.6"
     provided "org.embulk:embulk-core:0.8.6"