message: chore(tests): disable thread-loader in CI
  Our jobs are consuming too much CPU in CI. Disable thread-loader by
  checking the `OPENSHIFT_CI` environment variable.
diff: @@ -26,6 +26,7 @@ const HOT_RELOAD = process.env.HOT_RELOAD || 'true';
  const CHECK_CYCLES = process.env.CHECK_CYCLES || 'false';
  const ANALYZE_BUNDLE = process.env.ANALYZE_BUNDLE || 'false';
  const REACT_REFRESH = process.env.REACT_REFRESH;
  +const OPENSHIFT_CI = process.env.OPENSHIFT_CI;
  const WDS_PORT = 8080;
  /* Helpers */
  @@ -78,13 +79,14 @@ const config: Configuration = {
  exclude: /node_modules\/(?!(bitbucket|ky)\/)/,
  use: [
  { loader: 'cache-loader' },
  + // Disable thread-loader in CI
  + ...(!OPENSHIFT_CI
  + ? [
  {
  loader: 'thread-loader',
  - options: {
  - // Leave one core spare for fork-ts-checker-webpack-plugin
  - workers: require('os').cpus().length - 1,
  - },
  },
  + ]
  + : []),
  ...(REACT_REFRESH
  ? [
  {
  @@ -133,7 +135,7 @@ const config: Configuration = {
  },
  },
  { loader: 'cache-loader' },
  - { loader: 'thread-loader' },
  + ...(!OPENSHIFT_CI ? [{ loader: 'thread-loader' }] : []),
  {
  loader: 'css-loader',
  options: {
  