Use Node.js 12 in CI

.github/workflows/build-majestic.yml

@@ -84,7 +84,6 @@ jobs:
     name: JavaScript (Ubuntu)
     runs-on: ubuntu-20.04
     needs: ubuntu-runtime
-    if: false
 
     steps:
     - uses: actions/checkout@v2
@@ -96,6 +95,11 @@ jobs:
         sudo mv lib/* /usr/local/lib/
         sudo mv include/* /usr/local/include/
 
+    - name: Setup Node.js
+      run: |
+        nvm install 12
+        nvm use 12
+
     - name: Install dependencies
       working-directory: ./src/runtime/javascript
       run: |
@@ -193,7 +197,6 @@ jobs:
     name: JavaScript (macOS)
     runs-on: macOS-11
     needs: macos-runtime
-    if: false
 
     steps:
     - uses: actions/checkout@v2
@@ -205,6 +208,11 @@ jobs:
         sudo mv lib/* /usr/local/lib/
         sudo mv include/* /usr/local/include/
 
+    - name: Setup Node.js
+      run: |
+        nvm install 12
+        nvm use 12
+
     - name: Install dependencies
       working-directory: ./src/runtime/javascript
       run: |