Pin SQLAlchemy below 2

[bethac07]

modified from EmbeddedArtistry

Description

Resolves #250

What is the nature of your change?

• Bug fix (fixes an issue).

Checklist

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• I have read the CONTRIBUTING.md guidelines.
• My code follows the style guidelines of this project.
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• I have added tests that prove my fix is effective or that my feature works.
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[codecov-commenter]

Codecov Report

Merging #251 (5c15711) into master (afac3ea) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #251   +/-   ##
=======================================
  Coverage   95.71%   95.71%           
=======================================
  Files          53       53           
  Lines        2826     2826           
=======================================
  Hits         2705     2705           
  Misses        121      121           

Flag	Coverage Δ
unittests	95.71% <ø> (ø)

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[gwaybio]

Thanks @bethac07 and @d33bs !