chore: Update MSRV to 1.64.0

Author: epage

.clippy.toml

@@ -1 +1 @@
-msrv = "1.60.0"  # MSRV
+msrv = "1.64.0"  # MSRV

.github/workflows/ci.yml

@@ -49,15 +49,15 @@ jobs:
     - name: Test Release
       run: cargo test --release
   msrv:
-    name: "Check MSRV: 1.60.0"
+    name: "Check MSRV: 1.64.0"
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: 1.60.0  # MSRV
+        toolchain: 1.64.0  # MSRV
     - uses: Swatinem/rust-cache@v2
     - name: No default features
       run: cargo check --workspace --all-targets --no-default-features
@@ -107,7 +107,7 @@ jobs:
     - name: Install Rust
       uses: dtolnay/rust-toolchain@stable
       with:
-        toolchain: 1.60.0  # MSRV
+        toolchain: 1.64.0  # MSRV
         components: clippy
     - uses: Swatinem/rust-cache@v2
     - name: Install SARIF tools

Cargo.toml

@@ -14,7 +14,7 @@ homepage = "https://github.com/rust-cli/human-panic"
 categories = ["command-line-interface"]
 keywords = ["cli", "panic"]
 edition = "2018"
-rust-version = "1.60.0"  # MSRV
+rust-version = "1.64.0"  # MSRV
 include = [
   "build.rs",
   "src/**/*",