Function webTrackers

webTrackers(
trackers: readonly string[],
defaults?: readonly string[],
): readonly string[]
Keeps the link's reachable trackers ahead of the defaults, without duplicates.
Parameters
- trackers: readonly string[]
  Trackers from the link.
- defaults: readonly string[] = DEFAULT_WEBRTC_TRACKERS
  Trackers always announced to.
Returns readonly string[]
The wss:// trackers to announce to.
Example
```
webTrackers(['udp://t.example:80', 'wss://t.example'], ['wss://d.example']);
// ['wss://t.example', 'wss://d.example']
```