reduce parallelism for jasmine tests

Author: archmoj

.circleci/config.yml

@@ -73,7 +73,7 @@ jobs:
     environment:
       # Alaska time (arbitrary timezone to test date logic)
       TZ: "America/Anchorage"
-    parallelism: 12
+    parallelism: 4
     working_directory: ~/plotly.js
     steps:
       - browser-tools/install-browser-tools: &browser-versions