Fixing pip for python .env

Pytorch/environment.yml

@@ -9,7 +9,7 @@ dependencies:
   - pytorch 
   - pip:
     - papermill==0.14.1
-    - python-dotenv==0.9.0
+    - https://github.com/theskumar/python-dotenv/archive/master.zip
     - Pillow==5.2.0
     - wget==3.2
     - matplotlib==2.2.2