update requirements.txt to python 3.8

requirements.txt

@@ -1,39 +1,53 @@
-alabaster==0.7.10
-attrs==17.4.0
-Babel==2.5.3
-certifi==2018.1.18
+alabaster==0.7.12
+atomicwrites==1.4.0
+attrs==20.1.0
+Babel==2.8.0
+certifi==2020.6.20
 chardet==3.0.4
-coverage==4.5.1
-coveralls==1.3.0
+colorama==0.4.3
+coverage==5.2.1
+coveralls==2.1.2
 cycler==0.10.0
+decorator==4.4.2
 docopt==0.6.2
-docutils==0.14
-idna==2.6
-imagesize==1.0.0
-Jinja2==2.10.1
-kiwisolver==1.0.1
-MarkupSafe==1.0
-matplotlib==2.2.2
-more-itertools==4.1.0
+docutils==0.16
+idna==2.10
+imagesize==1.2.0
+iniconfig==1.0.1
+Jinja2==2.11.2
+joblib==0.16.0
+kiwisolver==1.2.0
+MarkupSafe==1.1.1
+matplotlib==3.3.1
+more-itertools==8.4.0
 networkx==2.4
-numpy==1.17.4
-packaging==17.1
-pandas==0.25.3
-patsy==0.5.0
-pluggy==0.6.0
-py==1.5.3
-Pygments==2.2.0
-pyparsing==2.2.0
-pytest==3.5.0
-pytest-cov==2.5.1
-python-dateutil==2.7.0
-pytz==2018.3
-requests==2.20.0
-scikit-learn==0.22.1
-scipy==1.3.3
-six==1.12
-snowballstemmer==1.2.1
-Sphinx==1.7.1
-sphinxcontrib-websupport==1.0.1
-statsmodels==0.10.2
-urllib3==1.24.2
+numpy==1.19.1
+packaging==20.4
+pandas==1.1.1
+patsy==0.5.1
+Pillow==7.2.0
+pluggy==0.13.1
+py==1.9.0
+Pygments==2.6.1
+pyparsing==2.4.7
+pytest==6.0.1
+pytest-cov==2.10.1
+python-dateutil==2.8.1
+pytz==2020.1
+requests==2.24.0
+scikit-learn==0.23.2
+scipy==1.5.2
+six==1.15.0
+snowballstemmer==2.0.0
+Sphinx==3.2.1
+sphinxcontrib-applehelp==1.0.2
+sphinxcontrib-devhelp==1.0.2
+sphinxcontrib-htmlhelp==1.0.3
+sphinxcontrib-jsmath==1.0.1
+sphinxcontrib-qthelp==1.0.3
+sphinxcontrib-serializinghtml==1.1.4
+statsmodels==0.11.1
+threadpoolctl==2.1.0
+toml==0.10.1
+urllib3==1.25.10
+wincertstore==0.2