Enable TypeScript (#8074)

* Enable Typescript

* Fix tests

* Fix tests again

* Automatically (re)build

* Updates

* Updates

* Update shrinkwrap

* Enable sourcemaps

.github/workflows/ci.yml

@@ -24,6 +24,8 @@ jobs:
     - name: Install dependencies
       if: steps.cache-node-modules.outputs.cache-hit != 'true'
       run: npm ci
+    - name: Build
+      run: npm run build
     - name: Test
       run: npm run test-with-coverage
     - name: Lint