Merge #308: Bump bdk version to 0.27 and bdk-ffi to 0.27.0

ec71ef5 Bump bdk version to 0.27 and bdk-ffi to 0.27.0 (thunderbiscuit)

Pull request description:

  ## Description
  This PR updates BDK to the latest version, `0.27.0`.

  ### Changelog notice
  ```txt
  - Update BDK to latest version 0.27 [#308]

  [#308](#308)
  ```

  #### 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

ACKs for top commit:
  notmandatory:
    ACK ec71ef5

Tree-SHA512: 2d97b2af5247a5021fb7e5db70a903ded243b8f298133da1b83f7610d4e8ffc5e8e1b65e60ae07a781334de9c1630dfc6f9d58f62ff240783c9c22afc1f8f907

Author: notmandatory

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "bdk-ffi"
-version = "0.26.0"
+version = "0.27.0"
 authors = ["Steve Myers <steve@notmandatory.org>", "Sudarsan Balaji <sudarsan.balaji@artfuldev.com>"]
 edition = "2018"
 license = "MIT OR Apache-2.0"
@@ -10,7 +10,7 @@ crate-type = ["staticlib", "cdylib"]
 name = "bdkffi"
 
 [dependencies]
-bdk = { version = "0.26", features = ["all-keys", "use-esplora-ureq", "sqlite-bundled", "rpc"] }
+bdk = { version = "0.27", features = ["all-keys", "use-esplora-ureq", "sqlite-bundled", "rpc"] }
 uniffi_macros = { version = "0.21.0", features = ["builtin-bindgen"] }
 uniffi = { version = "0.21.0", features = ["builtin-bindgen"] }