Bump bintray release version.

build.gradle

@@ -21,7 +21,7 @@ buildscript {
     }
     }
     dependencies {
     dependencies {
         classpath 'com.android.tools.build:gradle:1.2.3'
         classpath 'com.android.tools.build:gradle:1.2.3'
-        classpath 'com.novoda:bintray-release:0.3.2'
+        classpath 'com.novoda:bintray-release:0.3.4'
     }
     }
 }
 }