added requi.txt

requirements.txt

+attrs==19.3.0
+importlib-metadata==1.5.0
+more-itertools==8.2.0
+numpy==1.18.1
+packaging==20.1
+pandas==1.0.1
+pluggy==0.13.1
+py==1.8.1
+pyparsing==2.4.6
+pytest==5.3.5
+python-dateutil==2.8.1
+pytz==2019.3
+six==1.14.0
+wcwidth==0.1.8
+zipp==3.0.0