d3a14d411d2a1a37f07e42c28eae3a1836aec14d fix: enable blocking-https-rustls feature on esplora client (thunderbiscuit)
Pull request description:
The [`blocking` feature on the rust-esplora-client library](https://github.com/bitcoindevkit/rust-esplora-client/blame/master/Cargo.toml#L35) changed from ureq to minreq, which does not come with https enabled by default, breaking previously working code that simply enabled the `blocking` feature on the `bdk_esplora` crate.
This change will enable what is currently the "default https" [flag for the minreq library](https://docs.rs/minreq/latest/minreq/#https-or-https-rustls) when using the `blocking` feature on bdk_esplora, reverting that breaking change.
### Notes to the reviewers
Another way we could do this (let me know if this is preferable) is to add a new feature called `blocking-https-rustls`:
```rust
blocking = ["esplora-client/blocking"]
blocking-https-rustls = ["esplora-client/blocking-https-rustls"]
```
### Changelog notice
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### Checklists
#### All Submissions:
* [x] I've signed all my commits
* [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
* [x] I ran `cargo fmt` and `cargo clippy` before committing
#### New Features:
* [x] I've added tests for the new feature
* [x] I've added docs for the new feature
#### Bugfixes:
* [ ] This pull request breaks the existing API
* [ ] I've added tests to reproduce the issue which are now passing
* [ ] I'm linking the issue being fixed by this PR
ACKs for top commit:
storopoli:
ACK d3a14d411d2a1a37f07e42c28eae3a1836aec14d
evanlinjin:
ACK d3a14d411d2a1a37f07e42c28eae3a1836aec14d
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