tscherler requested the ability to override the config that js-builder-jest uses to support more use cases. This should be a relatively small effort.

Scope

• Read project's package.json and check for "jest" config element that is used by the "jest" command line utility but ignored by default in "gulp-jest"
• The default config from js-builder-jest should still be respected but the "jest" properties from package.json should be merged in and override anything in the default config.
• Need to consider if there any pitfalls doing this across the different test modes ("test", "test:fast", "test:debug"). These profiles may need to selectively trump incoming properties (ensuring that "test:fast" never runs with coverage enabled, etc). Since each profile uses just a handful of properties, it shouldn't be a problem.