Updates requirements.txt

Updates requirements.txt to specify the development environment by using exact package versions.

requirements.txt

@@ -1,21 +1,21 @@
-certifi>=2016.8.2
-chardet>=3.0.0
-cycler>=0.10.0
-idna>=2.2
-joblib>=0.11
-kiwisolver>=1.1.0
-matplotlib>=2.0.0
-mne>=0.18.0
-nose>=1.3.7
-numpy>=1.10.1
-pandas>=0.17.0
-pyparsing>=2.0.4
-python-dateutil>=2.4.2
-pytz>=2018.3
-requests>=2.8.1
-scikit-learn>=0.18
-scipy>=0.17.0
-six>=0.9.0
-sklearn>=0.0
-threadpoolctl>=1.0.0
-urllib3>=1.22
+certifi==2020.4.5.1
+chardet==3.0.4
+cycler==0.10.0
+idna==2.9
+joblib==0.14.1
+kiwisolver==1.2.0
+matplotlib==3.2.1
+mne==0.20.5
+nose==1.3.7
+numpy==1.18.5
+pandas==1.0.3
+pyparsing==2.4.7
+python-dateutil==2.8.1
+pytz==2020.1
+requests==2.23.0
+scikit-learn==0.22.2.post1
+scipy==1.4.1
+six==1.15.0
+sklearn==0.0
+threadpoolctl==2.1.0
+urllib3==1.25.9