Update react-day-picker package

[pdewouters]

❓Question

Hi, do you plan to update the react-day-picker package dependency? It's a major version behind, and the version included with matchbox doesn't support react 18 whereas the latest matchbox does, so it creates issues with npm

For example: ERROR in ./node_modules/@sparkpost/matchbox/dist/matchbox.esm.js 9:0-41 Module not found: Error: Can't resolve 'react-day-picker' in '/var/lib/jenkins/workspace/m-project/node_modules/@sparkpost/matchbox/dist' resolve 'react-day-picker' in '/var/lib/jenkins/workspace/my-project/node_modules/@sparkpost/matchbox/dist'