Call into package.json scripts from actions workflow

.github/workflows/main.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Build
         run: |
           cd extensions/ql-vscode
-          gulp
+          npm run build
         shell: bash
 
       - name: Prepare artifacts
@@ -69,7 +69,7 @@ jobs:
       - name: Build
         run: |
           cd extensions/ql-vscode
-          gulp
+          npm run build
         shell: bash
 
       - name: Lint

.github/workflows/release.yml

@@ -42,7 +42,7 @@ jobs:
       - name: Build
         run: |
           cd extensions/ql-vscode
-          gulp --release
+          npm run build -- --release
         shell: bash
 
       - name: Prepare artifacts