feat!: bump minimum node support to v20 & update typescript

BREAKING CHANGE: Drop support for non-LTS Node.js versions and upgrade
the typescript version to support the newer JS features.

Author: dhensby

.github/workflows/nodejs.yml

@@ -25,7 +25,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: 18.x
+          node-version-file: '.nvmrc'
           cache: 'npm'
       - name: Install dependencies
         run: npm clean-install
@@ -46,7 +46,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: 18.x
+          node-version-file: '.nvmrc'
           cache: 'npm'
       - name: Install dependencies
         run: npm clean-install
@@ -60,7 +60,7 @@ jobs:
       - codelint
     strategy:
       matrix:
-        node-version: [18.x, 20.x, 22.x]
+        node-version: [20.x, 22.x]
     steps:
       - name: Checkout code
         uses: actions/checkout@v3
@@ -85,10 +85,10 @@ jobs:
       - uses: actions/checkout@v3
         with:
           persist-credentials: false
-      - name: Use Node.js 20.x
+      - name: Use Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: 20.x
+          node-version-file: '.nvmrc'
           cache: 'npm'
       - name: Install deps
         run: npm ci
@@ -121,7 +121,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v3
         with:
-          node-version: "lts/*"
+          node-version-file: '.nvmrc'
           cache: 'npm'
       - name: Install dependencies
         run: npm clean-install

.nvmrc

@@ -0,0 +1 @@
+20