feat(core): allow registration of custom validators
feat(core): allow registration of custom validators

PesanskiGoran/valdr,SoftwareCraftsmen/valdr,kgislsompo/valdr,NFC-DITO/valdr,kgislsompo/valdr,SoftwareCraftsmen/valdr,PesanskiGoran/valdr,netceteragroup/valdr,NFC-DITO/valdr