v2.0.0

Breaking changes

• forRoot, forRootAsync, register and registerAsync doesn't receive an array of items anymore.
• registerAsync is now used to register async providers like: useFactory, useExisting or useClass.
• Property name was renamed to clientName in SoapModuleOptions and SoapModuleAsyncOptions interfaces;
• Defined SoapModuleOptionsFactoryType for createSoapModuleOptions and useFactory functions return types.

Internal changes

• Made some big refactoring on how providers are built;
• General refactoring for better code reading;
• Created SoapService class for client creation;
• Removed soap.utils;
• Added more unit tests;
• Added error when there's no async option provided;
• Updated dependencies;
• Updated docs to v2 + npm badges.

Included a lot of changes from @rjpkuyper PR #8 . Thanks!