~= improved Pipfile

Pipfile

@@ -6,17 +6,14 @@ verify_ssl = true
 [dev-packages]
 
 [packages]
-jupyter = "*"
-matplotlib = "*"
-pandas = "*"
-numpy = "*"
-scipy = "*"
-ruamel-yaml = "*"
-scikit-learn = "*"
-graphviz = "*"
-jupyterlab = "*"
-nbstripout = "*"
-nbconvert = "*"
-
-[requires]
-python_version = "3.6"
+jupyter = "==1.0.0"
+matplotlib = "==3.1.1"
+pandas = "==0.24.2"
+numpy = "==1.16.4"
+scipy = "==1.3.0"
+ruamel-yaml = "==0.15.99"
+scikit-learn = "==0.21.2"
+graphviz = "==0.11.1"
+jupyterlab = "==1.0.2"
+nbstripout = "==0.3.5"
+nbconvert = "==5.5.0"