Bump MSRV to Rust 1.63.0

As we have done all across the rust-bitcoin ecosystem update the MSRV to
Rust `v1.63.0`.

Author: tcharding

README.md

@@ -29,4 +29,10 @@ from `rust-bitcoincore-rpc` was just shamelessy stolen. As such I have maintaine
 author's list and added my own name for accountability. All bugs are my own (tcharding).
 
 - [rust-bitcoincore-rpcv0.19.0](https://github.com/rust-bitcoin/rust-bitcoincore-rpc)
-- [`bitcoind`](https://crates.io/crates/bitcoind)
+- [`bitcoind`](https://crates.io/crates/bitcoind)
+
+## Minimum Supported Rust Version (MSRV)
+
+This library should always compile with any combination of features on **Rust 1.63.0**.
+
+Use `Cargo-minimal.lock` to build the MSRV by copying to `Cargo.lock` and building.

client/Cargo.toml

@@ -14,7 +14,7 @@ categories = ["cryptography::cryptocurrencies"]
 keywords = ["bitcoin", "bitcoind", "json-rpc"]
 readme = "README.md"
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.63.0"
 exclude = ["tests", "contrib"]
 
 [package.metadata.docs.rs]

clippy.toml

@@ -1,2 +1,2 @@
-msrv = "1.56.1"
+msrv = "1.63.0"
 too-many-arguments-threshold = 13

json/Cargo.toml

@@ -14,7 +14,7 @@ categories = ["cryptography::cryptocurrencies"]
 keywords = ["bitcoin", "bitcoind", "json-rpc"]
 readme = "README.md"
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.63.0"
 exclude = ["tests", "contrib"]
 
 [features]

regtest/Cargo.toml

@@ -9,7 +9,7 @@ categories = ["cryptography::cryptocurrencies", "development-tools::testing"]
 keywords = ["bitcoin", "bitcoind", "json-rpc"]
 readme = "README.md"
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.63.0"
 exclude = ["tests", "contrib"]
 
 [dependencies]