Fixed improper Jackson annotations version.

Author: metacosm

build.gradle

@@ -122,7 +122,7 @@ dependencies {
 
     // JSON
     compile 'com.fasterxml.jackson.core:jackson-core:2.8.4'
-    compile 'com.fasterxml.jackson.core:jackson-annotations:2.8,4'
+    compile 'com.fasterxml.jackson.core:jackson-annotations:2.8.4'
     compile 'com.fasterxml.jackson.core:jackson-databind:2.8.4'
     compile 'com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.8.4'