New feature: additional way to set displayName for property when creating ValidationRules

[valichek]

My intention is to have customizable translation of property names depending on validated model.
It could be smth like:

ValidationRules.ensure('myProp').on(target).setDisplayName((propertyName) => {
  return i18next.t(propertyName);
})

[jdanyow]

check out the customizing messages section in the docs. There's an example showing how to override getDisplayName.

[jdanyow]

Also related: #328

[valichek]

@jdanyow setting getDisplayName on MessageProvider is useful but too global.

[jdanyow]

ok- this sounds like it's a duplicate of #328 - please add any thoughts/use-cases there.

Thanks!