[chef] ChefSpec v3.4.0

[Seth Vargo < >]

Ohai Chefs,

I just released ChefSpec v3.4.0 which includes a number of bug fixes and releases:

Bugfixes:

• Restore Berkshelf 2 support (missing edge case)
• Add negative failure message for subscribes/notifies matchers

Features:

• Added do_nothing matcher for asserting a resource performed no actions

Improvements:

• Increased spec coverage for matchers
• Support RSpec matchers in with_content

Happy testing!

Seth

@sethvargo