Update dependency python-dotenv to v0.17.1

Author: renovate-bot

requirements.txt

@@ -20,7 +20,7 @@ mypy-extensions==0.4.3; python_version >= "3.6"
 pathspec==0.8.0; python_version >= "3.6" and python_full_version < "3.0.0" or python_full_version >= "3.5.0" and python_version >= "3.6"
 protobuf==3.14.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"
 pymysql==0.10.1
-python-dotenv==0.14.0
+python-dotenv==0.17.1
 redis==3.5.3; (python_version >= "2.7" and python_full_version < "3.0.0") or (python_full_version >= "3.5.0")
 regex==2020.10.15; python_version >= "3.6"
 six==1.15.0; python_version >= "2.7" and python_full_version < "3.0.0" or python_full_version >= "3.5.0"