Update readme

Author: hbcarlos

README.md

@@ -16,7 +16,7 @@ Repo: https://github.com/google/blockly
 
 ## Requirements
 
-- JupyterLab == 3.4
+- JupyterLab == 3.6
 
 ## Install
 
@@ -53,14 +53,14 @@ The `jlpm` command is JupyterLab's pinned version of
 `yarn` or `npm` in lieu of `jlpm` below.
 
 ```bash
-micromamba create -n blockly -c conda-forge python nodejs pre-commit yarn jupyterlab==3.4 jupyter-packaging jupyterlab-language-pack-es-ES jupyterlab-language-pack-fr-FR ipykernel xeus-python xeus-lua
+micromamba create -n blockly -c conda-forge python nodejs=18 yarn pre-commit jupyterlab==3.6 jupyter-packaging jupyterlab-language-pack-es-ES jupyterlab-language-pack-fr-FR ipykernel xeus-python xeus-lua
 micromamba activate blockly
 # Clone the repo to your local environment
 # Change directory to the jupyterlab_blockly directory
 # Installing pre-commit to run command when adding commits
 pre-commit install
 # Install package in development mode
-pip install -e .
+pip install -e ".[dev]"
 # Link your development version of the extension with JupyterLab
 jupyter labextension develop . --overwrite
 # Rebuild extension Typescript source after making changes