Pin exact runtime dependency versions for tests (#740)

Author: Nothing4You

requirements-dev.txt

@@ -4,8 +4,8 @@ ipdb==0.13.9
 pytest==7.0.1
 pytest-cov==3.0.0
 pytest-sugar==0.9.4
-PyMySQL>=1.0.0,<=1.0.2
+PyMySQL==1.0.2
 sphinx>=1.8.1, <4.4.1
 sphinxcontrib-asyncio==0.3.0
-sqlalchemy>1.2.12,<=1.3.24
+SQLAlchemy==1.3.24
 uvloop==0.16.0; python_version < '3.11'