Set specific versions for all dependencies

requirements.txt

@@ -1,14 +1,14 @@
-docopt
+docopt~=0.6
-matplotlib
+matplotlib~=3.3
-mkdocs
+mkdocs~=1.1
-mkdocs-cinder
+mkdocs-cinder~=1.2
-networkx
+networkx~=2.5
-numpy
+numpy~=1.19
-p_tqdm
+p_tqdm~=1.3
-pandas
+pandas~=1.1
-pyomo
+pyomo~=5.7
-pytest
+pytest~=6.1
-python-markdown-math
+python-markdown-math~=0.8
-seaborn
+seaborn~=0.11
-sklearn
+scikit-learn~=0.23
-tqdm
+tqdm~=4.54