Drop uninstallable Node versions from CI and pin lint

Old Node (4-14) no longer installs on current runners (no arm64 builds
on macOS), so test the supported 18-current range instead. Pin the lint
job to Node 14 where the legacy xo still runs.

Author: simonepri

.github/workflows/lint.yml

@@ -14,7 +14,11 @@ jobs:
       - name: Setup repo
         uses: actions/checkout@v2
       - name: Setup node
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v4
+        with:
+          # Pinned: the legacy xo@0.20 toolchain crashes on modern Node
+          # (util.isDate was removed). Revisit when the toolchain is updated.
+          node-version: 14
       - name: Install dev dependencies
         run: |
           npm install --only=dev

.github/workflows/test-macos.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [current, 16, 14, 12, 10, 8, 6, 4]
+        node: [current, 22, 20, 18]
     steps:
       - name: Setup repo
         uses: actions/checkout@v3

.github/workflows/test-ubuntu.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [current, 16, 14, 12, 10, 8, 6, 4]
+        node: [current, 22, 20, 18]
     steps:
       - name: Setup repo
         uses: actions/checkout@v3

.github/workflows/test-windows.yml

@@ -8,12 +8,14 @@ on:
 
 jobs:
   test:
+    # windows-latest is Windows Server 2025, which ships without wmic, so the
+    # integration tests here run against the PowerShell fallback in lib/get.js.
     runs-on: windows-latest
     name: AVA & TSD & Benchmark & Codecov
     strategy:
       fail-fast: false
       matrix:
-        node: [current, 16, 14, 12, 10, 8, 6, 4]
+        node: [current, 22, 20, 18]
     steps:
       - name: Setup repo
         uses: actions/checkout@v3