Add JupyterLab dev dependency

Author: mfisher87

README.md

@@ -58,7 +58,7 @@ The `jlpm` command is JupyterLab's pinned version of
 # Clone the repo to your local environment
 # Change directory to the myextension directory
 # Install package in development mode
-pip install -e ".[test]"
+pip install -e ".[dev,test]"
 # Link your development version of the extension with JupyterLab
 jupyter labextension develop . --overwrite
 # Server extension must be manually installed in develop mode

pyproject.toml

@@ -28,6 +28,9 @@ dependencies = [
 dynamic = ["version", "description", "authors", "urls", "keywords"]
 
 [project.optional-dependencies]
+dev = [
+  "jupyterlab >=4",
+]
 test = [
     "coverage",
     "pytest",