FIX: isTesting is a function not a value

FIX: isTesting is a function not a value

diff --git a/assets/javascripts/initializers/future-relative-date.js.es6 b/assets/javascripts/initializers/future-relative-date.js.es6
index 5d4483d..65f8c7c 100644
--- a/assets/javascripts/initializers/future-relative-date.js.es6
+++ b/assets/javascripts/initializers/future-relative-date.js.es6
@@ -5,7 +5,7 @@ export default {
   name: "relative-future-date",
 
   initialize() {
-    if (!isTesting) {
+    if (!isTesting()) {
       this._tick();
     }
   },

GitHub sha: 471cb874