Swap over to Jest, breaking everything

.buildkite/pipeline.yaml

@@ -36,30 +36,20 @@ steps:
       - docker#v3.0.1:
           image: "node:12"
 
-  - label: ":karma: Tests"
+  - label: ":jest: Tests"
     agents:
       # We use a medium sized instance instead of the normal small ones because
       # webpack loves to gorge itself on resources.
       queue: "medium"
     command:
-      # Install chrome
-      - "echo '--- Installing Chrome'"
-      - "wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -"
-      - "sh -c 'echo \"deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main\" >> /etc/apt/sources.list.d/google.list'"
-      - "apt-get update"
-      - "apt-get install -y google-chrome-stable"
-      # Run tests
       - "echo '--- Fetching Dependencies'"
       - "./scripts/fetch-develop.deps.sh --depth 1"
       - "yarn install"
       - "echo '+++ Running Tests'"
       - "yarn test"
-    env:
-      CHROME_BIN: "/usr/bin/google-chrome-stable"
     plugins:
       - docker#v3.0.1:
           image: "node:10"
-          propagate-environment: true
 
   - label: ":hammer: Package"
     command: