Fix wpanalytics build with gradle 3.1
diff --git a/libs/analytics/WordPressAnalytics/build.gradle b/libs/analytics/WordPressAnalytics/build.gradle
index bbce619..6332955 100644
--- a/libs/analytics/WordPressAnalytics/build.gradle
+++ b/libs/analytics/WordPressAnalytics/build.gradle
@@ -40,7 +40,7 @@
 
 signing {
     required {
-        has("release") && project.properties.containsKey("signing.keyId") && project.properties.containsKey("signing.secretKeyRingFile")
+        project.properties.containsKey("signing.keyId") && project.properties.containsKey("signing.secretKeyRingFile")
     }
     sign configurations.archives
 }