Use conda-forge, not PyPI (#330)

Author: SylvainCorlay

.github/workflows/deploy-github-page.yml

@@ -70,7 +70,7 @@ jobs:
         shell: bash -l {0}
         run: |
           set -e
-          micromamba create -n xeus-lite-host jupyterlite-core=0.6 jupyter_server
+          micromamba create -n xeus-lite-host jupyterlite-core=0.6 jupyter_server jupyterlite-xeus
           micromamba activate xeus-lite-host
           cd build/test
           # Fresh install browsers, and run Emscripten tests in them
@@ -141,7 +141,6 @@ jobs:
         shell: bash -l {0}
         run: |
           micromamba activate xeus-lite-host
-          python -m pip install jupyterlite-xeus
           jupyter lite build \
               --XeusAddon.prefix=${{ env.PREFIX }} \
               --contents README.md \

.github/workflows/main.yml

@@ -254,7 +254,7 @@ jobs:
         run: |
           export BUILD_PREFIX=$MAMBA_ROOT_PREFIX/envs/xeus-cpp-wasm-build
           set -e
-          micromamba create -n xeus-lite-host jupyterlite-core=0.6
+          micromamba create -n xeus-lite-host jupyterlite-core jupyterlite-xeus
           micromamba activate xeus-lite-host
           cd build/test
           # Fresh install browsers, and run Emscripten tests in them
@@ -325,7 +325,6 @@ jobs:
         shell: bash -l {0}
         run: |
           micromamba activate xeus-lite-host
-          python -m pip install jupyterlite-xeus
           jupyter lite build --XeusAddon.prefix=${{ env.PREFIX }}
 
       - name: Setup tmate session