Fix install for Mac OS (#9)

Author: jisantuc

scripts/update

@@ -14,16 +14,7 @@ pip install jupyter notebook
 jupyter nbextension enable --py --sys-prefix widgetsnbextension
 pip install -e git+https://github.com/azavea/ipyleaflet#egg=9cfd238
 
-# MacOS has some sort of messy openSSL incompatibility
-# See https://github.com/pyca/cryptography/issues/3489
-if [ "$(uname -s)" == "Darwin" ]; then
-    pip install cryptography \
-        --global-option=build_ext \
-        --global-option="-L/usr/local/opt/openssl/lib" \
-        --global-option="-I/usr/local/opt/openssl/include"
-fi
-
 jupyter nbextension install --py --symlink --sys-prefix ipyleaflet
 jupyter nbextension enable --py --sys-prefix ipyleaflet
 
-python setup.py develop
+pip install -e .

setup.py

@@ -28,7 +28,7 @@
     ],
     extras_require={
         'notebook': [
-            'notebook == 4.0.0'
+            'notebook >= 4.0.0'
         ],
         'dev': [],
         'test': [],