fix: don't mypy unit_tests (#241)

Co-authored-by: Aaron ("AJ") Steers <[email protected]>

Author: natikgadzhi

mypy.ini

@@ -12,6 +12,7 @@ disallow_untyped_calls = True
 disallow_incomplete_defs = True
 disallow_untyped_defs = True
 warn_return_any = True
+exclude = unit_tests/
 
 # Only alert on the files we want to check
 follow_imports = silent