chore(cargo): bump MSRV to 1.63

.github/workflows/ci.yml

@@ -63,8 +63,8 @@ jobs:
             rust: beta
           - name: nightly
             rust: nightly
-          - name: 1.57.0
-            rust: 1.57.0  
+          - name: 1.63.0
+            rust: 1.63.0
 
     steps:
       - uses: actions/checkout@v2

Cargo.toml

@@ -4,7 +4,7 @@ version = "0.3.0"
 description = "Low level email encoding RFCs implementations"
 repository = "https://github.com/lettre/email-encoding"
 edition = "2021"
-rust-version = "1.57"
+rust-version = "1.63"
 license = "MIT OR Apache-2.0"
 categories = ["email", "encoding"]
 keywords = ["email", "rfc2047", "rfc2231"]

README.md

@@ -3,7 +3,7 @@
 [![crates.io](https://img.shields.io/crates/v/email-encoding.svg)](https://crates.io/crates/email-encoding)
 [![Documentation](https://docs.rs/email-encoding/badge.svg)](https://docs.rs/email-encoding)
 [![dependency status](https://deps.rs/crate/email-encoding/0.3.0/status.svg)](https://deps.rs/crate/email-encoding/0.3.0)
-[![Rustc Version 1.57.0+](https://img.shields.io/badge/rustc-1.57.0+-lightgray.svg)](https://blog.rust-lang.org/2021/12/02/Rust-1.57.0.html)
+[![Rustc Version 1.63.0+](https://img.shields.io/badge/rustc-1.63.0+-lightgray.svg)](https://blog.rust-lang.org/2022/08/11/Rust-1.63.0.html)
 [![CI](https://github.com/lettre/email-encoding/actions/workflows/ci.yml/badge.svg)](https://github.com/lettre/email-encoding/actions/workflows/ci.yml)
 [![codecov](https://codecov.io/gh/lettre/email-encoding/branch/main/graph/badge.svg)](https://codecov.io/gh/lettre/email-encoding)