Fix tests

.github/workflows/build.yml

@@ -48,7 +48,9 @@ jobs:
             yarn-
 
       - name: Install dependencies
-        run: python -m pip install -U jupyterlab~=4.0
+        # Use JLab 4.0.x branch because otherwise this will not bring
+        # the current toolkit version but the core version one.
+        run: python -m pip install -U jupyterlab~=4.0.0
       - name: Build the extension
         run: |
           set -eux
@@ -94,6 +96,6 @@ jobs:
           sudo rm -rf $(which node)
           sudo rm -rf $(which node)
           pip install myextension.tar.gz
-          pip install jupyterlab
+          pip install "jupyterlab~=4.0.0"
           jupyter labextension list 2>&1 | grep -ie "jupyter-ui-demo.*enabled"
           python -m jupyterlab.browser_check --no-browser-test

binder/environment.yml

@@ -12,8 +12,8 @@ channels:
 dependencies:
   # runtime dependencies
   - python >=3.10,<3.11.0a0
-  - jupyterlab >=4.0.0,<5
+  - jupyterlab >=4.0.0,<4.1.0
   # labextension build dependencies
-  - nodejs >=18,<19
+  - nodejs >=20,<21
   - pip
   - wheel

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["hatchling>=1.5.0", "jupyterlab>=4.0.0,<5", "hatch-nodejs-version"]
+requires = ["hatchling>=1.5.0", "jupyterlab>=4.0.0,<4.1.0", "hatch-nodejs-version"]
 build-backend = "hatchling.build"
 
 [project]
@@ -28,7 +28,7 @@ dynamic = ["version", "description", "authors", "urls", "keywords"]
 [project.optional-dependencies]
 dev = [
     "hatch>=1.5.0",
-    "jupyterlab"
+    "jupyterlab~=4.0.0"
 ]
 
 [tool.hatch.version]
@@ -72,7 +72,7 @@ version_cmd = "python scripts/bump_version.py --force"
 
 [tool.jupyter-releaser.hooks]
 before-build-npm = [
-    "python -m pip install 'jupyterlab>=4.0.0,<5'",
+    "python -m pip install 'jupyterlab>=4.0.0,<4.1.0'",
     "jlpm",
     "jlpm build:prod"
 ]