Limited Jest workers to 2 (#313)

* Limited Jest workers to 2

* Whoops, also config.yml

* Ugh and a colon

Author: Josh Goldberg

.circleci/config.yml

@@ -91,7 +91,7 @@ jobs:
             - attach_workspace:
                   at: "."
 
-            - run: npm run test -- --coverage
+            - run: npm run test:ci
 
     tsc:
         docker:

package.json

@@ -61,6 +61,7 @@
         "prettier": "prettier \"./src/*.{js,json,ts,xml,yaml}\" \"./src/**/*.{js,json,ts,xml,yaml}\" --ignore-path .prettierignore",
         "prettier:write": "npm run prettier -- --write",
         "test": "jest",
+        "test:ci": "jest --coverage --maxWorkers=2",
         "tsc": "tsc"
     },
     "version": "0.5.0"