KeyManager ERC165 does not support LSP20
LSP6KeyManager supports LSP20 call verification. However, in `supportInterface()` it does not return the LSP20 interfaceId.\\n```\\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\\n    return\\n    interfaceId == _INTERFACEID_LSP6 || interfaceId == _INTERFACEID_ERC1271 ||\\n        super.supportsInterface(interfaceId);\\n           }\\n```\\n\\nAs a result, clients which correctly check for support of LSP20 methods will not operate with the KeyManager implementation.
Insert another supported interfaceId under `supportsInterface()`.
```\\n    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\\n    return\\n    interfaceId == _INTERFACEID_LSP6 || interfaceId == _INTERFACEID_ERC1271 ||\\n        super.supportsInterface(interfaceId);\\n           }\\n```\\n