Bump version to 0.22.0-rc.2

d7163c3a97 Update electrum-client to 0.11.0 (Alekos Filini)

Pull request description:

  ### Description

  Update electrum-client to 0.11.0

  ### Changelog notice

  - Updated `electrum-client` to `0.11.0`

  ### 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:

  * [ ] I've added tests for the new feature
  * [ ] I've added docs for the new feature
  * [x] I've updated `CHANGELOG.md`

ACKs for top commit:
  danielabrozzoni:
    utACK d7163c3a97

Tree-SHA512: c8c295cc37f8b24e5b61447401df9044cdd9f92a577d82aa3fb9882f135245395651edff1b8710fe40897b8ce081344ac3cc98aefc7e37e22ffbbdcc419b5135

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "bdk"
-version = "0.22.0"
+version = "0.22.0-rc.2"
 edition = "2018"
 authors = ["Alekos Filini <alekos.filini@gmail.com>", "Riccardo Casatta <riccardo@casatta.it>"]
 homepage = "https://bitcoindevkit.org"
@@ -22,7 +22,7 @@ rand = "^0.7"
 
 # Optional dependencies
 sled = { version = "0.34", optional = true }
-electrum-client = { version = "0.10", optional = true }
+electrum-client = { version = "0.11", optional = true }
 rusqlite = { version = "0.27.0", optional = true }
 ahash = { version = "0.7.6", optional = true }
 reqwest = { version = "0.11", optional = true, default-features = false, features = ["json"] }
@@ -101,7 +101,7 @@ test-hardware-signer = ["hardware-signer"]
 lazy_static = "1.4"
 env_logger = "0.7"
 clap = "2.33"
-electrsd = "0.19.1"
+electrsd = "0.20"
 
 [[example]]
 name = "address_validator"