Update to stable JupyterLab 3.0 Python package

Author: jtpio

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
         architecture: 'x64'
 
     - name: Install dependencies
-      run: python -m pip install jupyterlab --pre
+      run: python -m pip install jupyterlab~=3.0
 
     - name: Install the extension
       run: |

binder/environment.yml

@@ -3,6 +3,6 @@ channels:
 - conda-forge
 dependencies:
 - python=3
-- jupyterlab=2
-- jupyter_resource_usage=0.3.6
+- jupyterlab=3
+- jupyter_resource_usage=0.5.1
 - nodejs

pyproject.toml

@@ -1,3 +1,3 @@
 [build-system]
-requires = ["jupyter_packaging~=0.7.9", "jupyterlab>=3.0.0rc10,==3.*", "setuptools>=40.8.0", "wheel"]
+requires = ["jupyter_packaging~=0.7.9", "jupyterlab~=3.0", "setuptools>=40.8.0", "wheel"]
 build-backend = "setuptools.build_meta"