Bump MSRV to Rust 1.63.0

As we have done in `rust-bitcoin` bump the MSVR to Rust 1.63.0

Author: tcharding

.github/workflows/rust.yml

@@ -54,7 +54,7 @@ jobs:
         run: ./maintainer-tools/ci/run_task.sh nightly
 
   MSRV:                         # 1 jobs, minimal lock file only.
-    name: Test - 1.56.1 toolchain
+    name: Test - 1.63.0 toolchain
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -71,7 +71,7 @@ jobs:
       - name: "Select toolchain"
         uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: "1.56.1"
+          toolchain: "1.63.0"
       - name: "Set dependencies"
         run: cp Cargo-${{ matrix.dep }}.lock Cargo.lock
       - name: "Run test script"

Cargo.toml

@@ -8,7 +8,8 @@ repository = "https://github.com/rust-bitcoin/rust-miniscript/"
 description = "Miniscript: a subset of Bitcoin Script designed for analysis"
 keywords = [ "crypto", "bitcoin", "miniscript", "script" ]
 readme = "README.md"
-edition = "2018"
+edition = "2021"
+rust-version = "1.63.0"
 
 [features]
 default = ["std"]

clippy.toml

@@ -1,3 +1,3 @@
-msrv = "1.56.1"
+msrv = "1.63.0"
 # plan API returns Self as an error type for an large-ish enum
 large-error-threshold = 256

fuzz/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "descriptor-fuzz"
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.63.0"
 version = "0.0.1"
 authors = ["Generated by fuzz/generate-files.sh"]
 publish = false

fuzz/generate-files.sh

@@ -13,7 +13,7 @@ cat > "$REPO_DIR/fuzz/Cargo.toml" <<EOF
 [package]
 name = "descriptor-fuzz"
 edition = "2021"
-rust-version = "1.56.1"
+rust-version = "1.63.0"
 version = "0.0.1"
 authors = ["Generated by fuzz/generate-files.sh"]
 publish = false