add update check and self update options

### Description:
- add update flags
```console
UPDATE:
   -up, -update                 update uncover to latest version
   -duc, -disable-update-check  disable automatic uncover update check

```
- Reference: https://github.com/projectdiscovery/tlsx/blob/8038ac06765d490210aa8bf753f44758a653b39f/cmd/tlsx/main.go#L125
