added requirements.txt

requirements.txt

+astroid==2.9.3
+click==8.0.3
+Flask==2.0.3
+isort==5.10.1
+itsdangerous==2.0.1
+Jinja2==3.0.3
+lazy-object-proxy==1.7.1
+MarkupSafe==2.0.1
+mccabe==0.6.1
+platformdirs==2.5.0
+pylint==2.12.2
+toml==0.10.2
+typing_extensions==4.1.1
+Werkzeug==2.0.3
+wrapt==1.13.3