Convert specs to RSpec 3.0.0 syntax with Transpec

This conversion is done by Transpec 2.2.1 with the following command:
transpec

* 45 conversions
from: obj.should
to: expect(obj).to

* 8 conversions
from: be_true
to: be_truthy

* 5 conversions
from: be_false
to: be_falsey

* 4 conversions
from: == expected
to: eq(expected)

* 1 conversion
from: failure_message_for_should { }
to: failure_message { }

For more details:
https://github.com/yujinakayama/transpec#supported-conversions
RSpec: Support block argument for #perform_queries