Try fixing UI tests

Author: martinRenou

.github/workflows/main.yml

@@ -94,14 +94,13 @@ jobs:
       - name: Setup conda
         uses: conda-incubator/setup-miniconda@v2
         with:
+          activate-environment: ipycanvas-dev
+          environment-file: dev-environment.yml
           python-version: ${{ matrix.python-version }}
           mamba-version: "*"
           auto-activate-base: false
           channels: conda-forge
 
-      - name: Install dependencies
-        run: mamba install python=${{ matrix.python-version }} pip yarn jupyterlab ipywidgets jupyter-packaging nodejs=16
-
       - uses: actions/download-artifact@v2
         with:
           name: dist ${{ github.run_number }}

dev-environment.yml

@@ -7,7 +7,7 @@ dependencies:
     - nodejs=16
     - jupyter-packaging
     - jupyterlab=3
-    - ipywidgets>=7.6
+    - ipywidgets>=7.6,<8
     - setuptools
     - wheel
     - twine

ui-tests/package.json

@@ -14,7 +14,7 @@
   "author": "ipycanvas",
   "license": "Apache-2.0",
   "dependencies": {
-    "@jupyterlab/galata": "~4.0.2",
+    "@jupyterlab/galata": "^4.3.5",
     "klaw-sync": "^6.0.0",
     "rimraf": "^3.0.2"
   }