fix(jest-cli): fix typo in options when spawning workers (#5374)

Author: dlmr

packages/jest-cli/src/reporters/coverage_reporter.js

@@ -158,7 +158,7 @@ export default class CoverageReporter extends BaseReporter {
     } else {
       // $FlowFixMe: assignment of a worker with custom properties.
       worker = new Worker(require.resolve('./coverage_worker'), {
-        exposeMethods: ['worker'],
+        exposedMethods: ['worker'],
         maxRetries: 2,
         numWorkers: this._globalConfig.maxWorkers,
       });