chore: add node 20 to CI

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
         os: [ubuntu-latest]
         # Workspaces support was added from npm 7, so Node 14 isn't supported to
         # build this library.
-        node-version: ["16", "18"]
+        node-version: ["16", "18", "20"]
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: 16
+          node-version: 20
           cache: npm
           registry-url: "https://registry.npmjs.org"
       - run: npm ci --workspaces

.github/workflows/reusable-audit.yml

@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: "16"
+          node-version: "20"
           registry-url: "https://registry.npmjs.org"
           cache: "npm"
       # Install dependencies so license-checker actually checks them:

.github/workflows/reusable-lint.yml

@@ -15,7 +15,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
-          node-version: "16"
+          node-version: "20"
           cache: "npm"
       # Check the package.json is correctly formed
       - if: ${{inputs.usePackageCheck}}