Update build.yml

Author: raar1

.github/workflows/build.yml

@@ -11,9 +11,9 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v1
     - name: Install node
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
-       node-version: '10.x'
+       node-version: '12.x'
     - name: Install Python
       uses: actions/setup-python@v1
       with:
@@ -22,10 +22,6 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install wheel
-        conda install -c conda-forge jupyterlab
-        conda install -c conda-forge nodejs=12
-        conda install -c conda-forge typescript
-        conda install ruamel.yaml
         python -m pip install -r requirements.txt
     - name: Build the extension
       run: |