chore(jest): Ignore mocks as modules

[ConradJChan]

Cleans up the warning when running the tests

jest-haste-map: duplicate manual mock found: data
  The following files share their name; please delete one of them:
    * <rootDir>/src/highlight/__mocks__/data.ts
    * <rootDir>/src/region/__mocks__/data.ts

jest-haste-map: duplicate manual mock found: data
  The following files share their name; please delete one of them:
    * <rootDir>/src/region/__mocks__/data.ts
    * <rootDir>/src/store/highlight/__mocks__/data.ts

jest-haste-map: duplicate manual mock found: index
  The following files share their name; please delete one of them:
    * <rootDir>/src/components/ReplyForm/__mocks__/index.ts
    * <rootDir>/src/store/__mocks__/index.ts

[mxiao6]

Thank you for getting rid of them!

[jstoffan]

Nice.