Update dev-install and package.json so dev installs work.

It was important to change the workspaces in package.json to point to the new locations so that yarn/lerna could find the new locations.

I also updated the dev-install.sh to be consistent with how it was installing each python package.

dev-install.sh

@@ -38,22 +38,19 @@ yarn install
 yarn run build
 
 echo -n "widgetsnbextension"
-cd widgetsnbextension
-pip install -v -e .
+pip install -v -e ./python/widgetsnbextension
 if [[ "$OSTYPE" == "msys" ]]; then
     jupyter nbextension install --overwrite --py $nbExtFlags widgetsnbextension
 else
     jupyter nbextension install --overwrite --py --symlink $nbExtFlags widgetsnbextension
 fi
 jupyter nbextension enable --py $nbExtFlags widgetsnbextension
-cd ../..
 
 echo -n "ipywidgets"
-cd python/ipywidgets
-pip install -v -e ".[test]"
-cd ../..
+pip install -v -e "./python/ipywidgets[test]"
 
 if test "$skip_jupyter_lab" != yes; then
+    echo -n "jupyterlab_ipywidgets"
     pip install jupyter_packaging
     pip install -ve ./python/jupyterlab_widgets
     jupyter labextension develop ./python/jupyterlab_widgets --overwrite

package.json

@@ -2,9 +2,9 @@
   "private": true,
   "workspaces": [
     "packages/*",
-    "widgetsnbextension",
+    "python/widgetsnbextension",
     "examples/*",
-    "jupyterlab_widgets"
+    "python/jupyterlab_widgets"
   ],
   "scripts": {
     "build": "lerna run build --ignore \"@jupyter-widgets/example-*\"",