fix: require Node.js 24.18.1 and npm 12 and use TypeScript v7

.github/actions/install-npm/action.yml

@@ -0,0 +1,14 @@
+name: Install NPM
+description: >
+  Installs the NPM version required by the `engines.npm` directive in
+  package.json, which is required for the project to build correctly.
+
+runs:
+  using: composite
+  steps:
+    - name: Install NPM
+      shell: bash
+      run: |
+        npmVersion="$(node -p 'require(`${process.env.GITHUB_WORKSPACE}/package.json`).engines.npm')"
+        echo "Installing npm@${npmVersion}"
+        npm install -g "npm@${npmVersion}"

.github/workflows/test-and-release.yaml

@@ -19,13 +19,16 @@ jobs:
 
       - uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
-          node-version: "24.x"
+          node-version: ">=24.18.1 <25"
           cache: "npm"
 
+      - name: Install NPM version specified in package.json
+        uses: ./.github/actions/install-npm
+
       - name: Install dependencies
         run: npm ci --no-audit
 
-      - run: npx tsgo
+      - run: npx tsc
 
       - run: npm test
 

.npmrc

@@ -1 +1,2 @@
 @jsr:registry=https://npm.jsr.io
+allow-remote=root

CONTRIBUTING.md

@@ -15,7 +15,7 @@ for AWS Lambda functions used in nRF Cloud and is published to
 
 ## Testing
 
-1. Run `npx tsgo` to type-check the project.
+1. Run `npx tsc` to type-check the project.
 1. Run `npm test` to run the unit tests.
 
 ## Releasing a new version

README.md

@@ -26,3 +26,9 @@ export const handler = middy()
     track("some:metric", MetricUnit.Count, 1);
   });
 ```
+
+## TypeScript 6 and 7
+
+This repo
+[runs TypeScript 6 and 7 side by side](https://devblogs.microsoft.com/typescript/announcing-typescript-7-0/#running-side-by-side-with-typescript-6.0),
+[so that eslint works](https://github.com/typescript-eslint/typescript-eslint/issues/10940#issuecomment-4922812181).