chore(ci): update mrsv to 1.56.0 (edition = 2021)

.github/workflows/ci.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.50.0, stable, beta, nightly]
+        rust: [1.56.0, stable, beta, nightly]
     steps:
       - name: Rust install
         uses: actions-rs/toolchain@v1
@@ -61,7 +61,7 @@ jobs:
       - name: Rust install
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.50.0
+          toolchain: 1.56.0
           profile: minimal
           override: true
           components: rustfmt

.github/workflows/main.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.50.0, stable]
+        rust: [1.56.0, stable]
     steps:
       - name: Rust install
         uses: actions-rs/toolchain@v1

.github/workflows/pr.yaml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        rust: [1.50.0, stable]
+        rust: [1.56.0, stable]
     steps:
       - name: Rust install
         uses: actions-rs/toolchain@v1
@@ -33,7 +33,7 @@ jobs:
       - name: Rust install
         uses: actions-rs/toolchain@v1
         with:
-          toolchain: 1.42.0
+          toolchain: 1.56.0
           profile: minimal
           override: true
           components: rustfmt

README.md

@@ -2,7 +2,8 @@
 
 [![crate](https://img.shields.io/crates/v/tmux-copyrat.svg)](https://crates.io/crates/tmux-copyrat)
 [![documentation](https://docs.rs/tmux-copyrat/badge.svg)](https://docs.rs/tmux-copyrat)
-[![minimum rustc 1.8](https://img.shields.io/badge/rustc-1.50+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
+[![minimum rustc 1.8](https://img.shields.io/badge/rustc-1.56+-red.svg)](https://rust-lang.github.io/rfcs/2495-min-rust-version.html)
+[![minimum rustc 1.8](https://img.shields.io/badge/edition-2021-blue.svg)](https://doc.rust-lang.org/edition-guide/rust-2021/index.html)
 [![build status](https://github.com/graelo/tmux-copyrat/workflows/main/badge.svg)](https://github.com/graelo/tmux-copyrat/actions)
 
 

ci/rustup.sh

@@ -5,6 +5,6 @@
 set -ex
 
 ci=$(dirname $0)
-for version in 1.50.0 stable beta nightly; do
+for version in 1.56.0 stable beta nightly; do
     rustup run "$version" "$ci/test_full.sh"
 done

ci/test_full.sh

@@ -3,7 +3,7 @@
 set -e
 
 CRATE=tmux-copyrat
-MSRV=1.50
+MSRV=1.56
 
 get_rust_version() {
   local array=($(rustc --version));