Fixed invalid constructors annotations, removed unused dynamic class property

[sabas]

Hello @andreyserdjuk and thank you! Are you using Iftmin? If I recall correctly I left it half-baked so perhaps it is missing part of segments... Are you planning to extend it?

[andreyserdjuk]

Hi, @sabas , at this moment I don't use Iftmin, - switched to extending Message.

[andreyserdjuk]

@sabas could you please merge it if everything is ok. Otherwise Interchange cannot be instantiated normally with custom $interchangeCode without ignore comments kinda @phpstan-ignore-next-line. Same issue with Message class.

[sabas]

Ok . Thanks!