build: update MSRV to 1.74

It may become difficult to upgrade dependencies in the future.

- I don't want to fall too far behind. Many automatic dependency updates are now failing, indicating that breaking changes are happening upstream that we haven't integrated.
- Since git-branchless is a CLI application, it doesn't have its downstream dependents to worry about breaking.

The specific value is somewhat arbitrary:

- We're just following `clap`'s current MSRV,
  - which aims to trail the latest Rust version by 6-9 months
    - (and the management of `clap`'s MSRV is its entire own topic).
  - My hope is that many applications in the Rust ecosystem also follow the `clap` MSRV and that packagers have worked out the installation strategy for those applications.

.github/workflows/linux-git-devel.yml

@@ -53,7 +53,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.67.0
+          toolchain: 1.74
           override: true
 
       - uses: actions/checkout@v4

.github/workflows/linux.yml

@@ -74,7 +74,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.67.0
+          toolchain: 1.74
           override: true
 
       - name: Cache dependencies

.github/workflows/macos.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.67.0
+          toolchain: 1.74
           override: true
 
       - name: Cache dependencies

.github/workflows/windows.yml

@@ -20,7 +20,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: 1.67.0
+          toolchain: 1.74
           override: true
 
       - name: Cache dependencies

.gitpod.yml

@@ -2,7 +2,7 @@ image:
   file: .gitpod/Dockerfile
 tasks:
   - init: |
-      rustup default 1.67.0
+      rustup default 1.74
       cargo test --no-run
       cargo install cargo-insta
       cargo install git-branchless && git branchless init

git-branchless/Cargo.toml

@@ -11,7 +11,7 @@ license = "MIT OR Apache-2.0"
 name = "git-branchless"
 readme = "../README.md"
 repository = "https://github.com/arxanas/git-branchless"
-rust-version = "1.67.0"
+rust-version = "1.74"
 version = "0.8.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html