mln-did 3.4.0

Derived/adapted from sol-did of Martin Riedel
Documentation
mod add_service;
mod add_verification_method;
mod close;
mod initialize;
mod migrate;
mod remove_service;
mod remove_verification_method;
mod resize;
mod set_controllers;
mod set_vm_flags;
mod update;

pub use add_service::*;
pub use add_verification_method::*;
pub use close::*;
pub use initialize::*;
pub use migrate::*;
pub use remove_service::*;
pub use remove_verification_method::*;
pub use resize::*;
pub use set_controllers::*;
pub use set_vm_flags::*;
pub use update::*;