Merge #94: fix(ci): pin tokio to 1.38.1 on MSRV step

16cdd38 fix(ci): pin tokio to 1.38.1 on msrv step (Leonardo Lima)

Pull request description:

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  ### Description

  As previously noticed on bitcoindevkit/bdk#1524, tokio raised their MSRV to `1.70.0` in their latest release, in short it was because they moved to `mio 1.0` which requires `1.70.0` MSRV.

  Although we don't have `tokio` as a direct dependency on `rust-esplora-client` it comes as a transitive dependency from `reqwest`.

  This PR adds the necessary pinning on CI and updates the instruction on `README.md` in order to properly build on MSRV.

  <!-- Describe the purpose of this PR, what's being adding and/or fixed -->

  ### Notes to the reviewers

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  of the PR were done in a specific way -->

  ### Changelog notice

  - Adds another MSRV pinning step on CI for the `tokio 1.38.1`.

  <!-- Notice the release manager should include in the release tag message changelog -->
  <!-- See https://keepachangelog.com/en/1.0.0/ for examples -->

  ### 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

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ACKs for top commit:
  notmandatory:
    ACK 16cdd38

Tree-SHA512: 3b98bc96ff797b67bcec215bc957561698e06c74d4184780aff4d129630f2216f2aa415a0042f3551a9d6197d6aa376cb540daf2a5ead996f4ba20b1674e4215

.github/workflows/cont_integration.yml

@@ -59,6 +59,7 @@ jobs:
  cargo update -p time --precise "0.3.20"
  cargo update -p home --precise 0.5.5
  cargo update -p url --precise "2.5.0"
+ cargo update -p tokio --precise "1.38.1"
  - name: Build
  run: cargo build --features ${{ matrix.features }} --no-default-features
  - name: Clippy

README.md

@@ -23,4 +23,5 @@ cargo update -p zstd-sys --precise "2.0.8+zstd.1.5.5"
 cargo update -p time --precise "0.3.20"
 cargo update -p home --precise 0.5.5
 cargo update -p url --precise "2.5.0"
+cargo update -p tokio --precise "1.38.1"
 ```