Use Node.js 14 in actions on Github

Tabris.js requires Node.js v14. On November 29, the default version of
Node.js in Github VMs changed from v14 to v16. We need to explicitly
define the Node.js version to override this default.

Author: karolszafranski

.github/workflows/build-2.x-nightly-ios-app.yml

@@ -18,6 +18,11 @@ jobs:
         build_type: [release, debug]
     steps:
 
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: '14'
+
       - name: Checkout
         uses: actions/checkout@v2
         with:

.github/workflows/build-3.x-nightly-ios-app.yml

@@ -18,6 +18,11 @@ jobs:
         build_type: [release, debug]
     steps:
 
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: '14'
+
       - name: Checkout
         uses: actions/checkout@v2
         with:

.github/workflows/build-master-ios-app.yml

@@ -18,6 +18,11 @@ jobs:
         build_type: [release, debug]
     steps:
 
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: '14'
+
       - name: Checkout
         uses: actions/checkout@v2
         with: