Read dd-originated flag and update test

[chante-gobel]

What's being changed

• Version bump: 1.3.0 → 1.4.0
• Added ddOriginated to the return value of handlePush in foundation.ts- it now resolves [{ url, ddOriginated }] where ddOriginated reflects the dd-originated flag from the push payload
• Fixed the @method JSDoc tag on handlePush - it was incorrectly labelled
• Fixed tests in foundation.spec.ts to correctly test the new return shape and call the right method name handlePush not handleLink

Why it's being changed

Dotdigital push notifications include a dd_originated flag in the payload to indicate the message was sent by the Dotdigital platform. Consumers of the SDK need access to this flag to differentiate Dotdigital-originated pushes from other push messages.

How to review / test this change

• Run npm run test - all Foundation tests should pass
• Should read dd-originated flag from payload
• Should read dd-originated flag from payload without deep link
• Should default dd-originated to false when not present

Link to work item

https://dev.azure.com/dotdigital/ec/_workitems/edit/345331