fix: exclude test types from core

[genaris]

In Core we are including test types in the source code, and since now we have dependency on DIDComm module it was messing up the core package build process (it creates 2 directories, one with core and another with didcomm).

Thanks @sairanjit for noticing and showing the solution for this!

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[TimoGlastra]

and since now we have dependency on DIDComm module

Does core depend on didcomm?

[genaris]

and since now we have dependency on DIDComm module

Does core depend on didcomm?

By mistake, due to this jest types file that I'm excluding here.