enable typescript support for cypress

tests/cypress/integration/core/capitalize.spec.ts

@@ -0,0 +1,9 @@
+import { capitalize } from '@tiptap/core'
+
+describe('capitalize test', () => {
+  it('capitalize a word', () => {
+    const capitalized = capitalize('test')
+
+    expect(capitalized).to.eq('Test')
+  })
+})