Dset dependency vulnerability issue

[megob56]

react-scanner is using dset version 3.1.2 which is causing high severity warnings on npm.

Github advisory board warns of a prototype pollution vulnerability which can be resolved by upgrading dset to version 3.1.4 where a patch has been added to fix this vulnerability.

Can the version of dset in this package please be upgraded to version 3.1.4 to eliminate the vulnerability issue?

[mikbeach]

I've raised a PR to update dset.

#77