change to "rspec", ">= 3.0.0.beta2"
Merge branch 'master' of github.com:philostler/rspec-sidekiq into rspec3-beta

Conflicts:
	lib/rspec/sidekiq/matchers/have_enqueued_job.rb
	rspec-sidekiq.gemspec
remove alias_method
change CI to work with rbx-2
Merge branch 'pr/47' into 2-0

Conflicts:
	.travis.yml
	lib/rspec/sidekiq/batch.rb
	rspec-sidekiq.gemspec
	spec/rspec/sidekiq/matchers/be_unique_spec.rb
Linting pass (excludes matchers implementations)
Merge branch '2-0-0'