deprecation: deprecate python 3.7

[math411]

Issue #, if available:

Description of changes: Removes support or Python3.7

Later on will add a follow up PR for fixing GH actions similar to https://github.com/aws/amazon-braket-sdk-python/commit/a8974e35b251e6056b7c4184f0949bb544451c21

Testing done:

Merge Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your pull request.

General

• [ x ] I have read the CONTRIBUTING doc
• [ x ] I used the commit message format described in CONTRIBUTING
• [ x ] I have updated any necessary documentation, including READMEs and API docs (if appropriate)

Tests

• [ x ] I have added tests that prove my fix is effective or that my feature works (if appropriate)
• [ x ] I have checked that my tests are not configured for a specific region or account (if appropriate)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Merging #4 (7052f7c) into main (d1e69ca) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##             main       #4   +/-   ##
=======================================
  Coverage   98.26%   98.26%           
=======================================
  Files           2        2           
  Lines         288      288           
  Branches       84       84           
=======================================
  Hits          283      283           
  Misses          2        2           
  Partials        3        3           

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.