Jasmine GJS 2.6.4

• The internal copy of the Jasmine library has been updated to version 2.6.4, which brings:
  • Add toBeNegativeInfinity(), toBePositiveInfinity(), toHaveBeenCalledBefore() matchers
  • Add spyOnProperty() for get/set accessors
  • Add support for ES6 sets to toContain() and toEqual()
  • Bug fixes included in 2.6.0, 2.6.1, 2.6.2, 2.6.3 and 2.6.4
• Thanks to Andy Holmes for contributing.