Bump msrv to 1.60

For dep: syntax

.github/workflows/check.yml

@@ -19,7 +19,7 @@ jobs:
           - macos
         version:
           - stable
-          - 1.58.0
+          - 1.60.0
 
     name: Test on ${{ matrix.platform }} with ${{ matrix.version }}
     runs-on: "${{ matrix.platform }}-latest"

Cargo.toml

@@ -15,7 +15,7 @@ readme = "README.md"
 
 edition = "2021"
 resolver = "2"
-rust-version = "1.58.0"
+rust-version = "1.60.0"
 
 include = ["src", "examples", "tests", "build.rs", "/*manifest*", "README.md"]
 
@@ -70,7 +70,7 @@ trycmd = "0.13.4"
 
 [features]
 dev-console = ["console-subscriber"]
-mimalloc = []
+mimalloc = ["dep:mimalloc"]
 
 [profile.release]
 debug = 1 # for stack traces

README.md

@@ -25,7 +25,7 @@ Install or upgrade today with [Binstall](https://github.com/ryankurte/cargo-bins
 $ cargo binstall cargo-watch
 ```
 
-Or with cargo (rustc >= 1.58.0) if you don't have Binstall yet:
+Or with cargo (rustc >= 1.60.0) if you don't have Binstall yet:
 
 ```bash
 $ cargo install cargo-watch