Update to Worker SDK version 14.7.0 (#44)

Author: improbable-jonphillips

spatialos.json

@@ -1,11 +1,11 @@
 {
   "name": "your_project_name_here",
   "project_version": "1.0.0",
-  "sdk_version": "14.6.1",
+  "sdk_version": "14.7.0",
   "dependencies": [
     {
       "name": "standard_library",
-      "version": "14.6.1"
+      "version": "14.7.0"
     }
   ]
 }