fix: add isort dev dependency (#315)

pyproject.toml

@@ -101,6 +101,7 @@ pytest = "^7.3.1"
 pytest-mock = "^3.10.0"
 pytest-env = "^0.8.1"
 click = "^8.1.3"
+isort = "^5.12.0"
 
 [tool.poetry.extras]
 streamlit = ["streamlit"]