A simple rust wrapper around [crt.sh](https://crt.sh).
Get the certificate overview for a domain:
```rs
let certs: Vec<CrtShEntry> = get_entries("example.com").await.unwrap();
```
Get a specific certificate (identified by the previous returned crt.sh ID)
```rs
let cert: pem::Pem = get_certificate(5813209289).await.unwrap();
```