Investigate if we're managing dependencies properly.

[idanci]

Describe the bug
Without some explicit require statements in spec_helper, tests become flaky and depend on the order of execution.

To Reproduce
Steps to reproduce the behavior:

1. Checkout to an older version of sqewer, before 8.1.0 or comment out this line
2. Run rspec spec/sqewer/connection_spec.rb:41
3. See uninitialized constant Aws error

Expected behavior
sqewer should not explicitly depend on Aws::SQS