Bump to Edition 2021 and rust-version 1.59

Author: adamgreig

Cargo.toml

@@ -12,7 +12,8 @@ name = "cortex-m"
 readme = "README.md"
 repository = "https://github.com/rust-embedded/cortex-m"
 version = "0.7.4"
-edition = "2018"
+edition = "2021"
+rust-version = "1.59"
 links = "cortex-m"  # prevent multiple versions of this crate to be linked together
 
 [dependencies]

cortex-m-rt/Cargo.toml

@@ -15,7 +15,8 @@ repository = "https://github.com/rust-embedded/cortex-m"
 version = "0.7.1"
 autoexamples = true
 links = "cortex-m-rt" # Prevent multiple versions of cortex-m-rt being linked
-edition = "2018"
+edition = "2021"
+rust-version = "1.59"
 
 [dependencies]
 cortex-m-rt-macros = { path = "macros", version = "=0.7.0" }

cortex-m-rt/macros/Cargo.toml

@@ -8,7 +8,8 @@ license = "MIT OR Apache-2.0"
 name = "cortex-m-rt-macros"
 repository = "https://github.com/rust-embedded/cortex-m"
 version = "0.7.0"
-edition = "2018"
+edition = "2021"
+rust-version = "1.59"
 
 [lib]
 proc-macro = true

cortex-m-semihosting/Cargo.toml

@@ -12,7 +12,8 @@ name = "cortex-m-semihosting"
 readme = "README.md"
 repository = "https://github.com/rust-embedded/cortex-m"
 version = "0.4.1"
-edition = "2018"
+edition = "2021"
+rust-version = "1.59"
 
 [features]
 inline-asm = []

panic-semihosting/Cargo.toml

@@ -11,6 +11,8 @@ license = "MIT OR Apache-2.0"
 name = "panic-semihosting"
 repository = "https://github.com/rust-embedded/cortex-m"
 version = "0.5.6"
+rust-version = "1.59"
+edition = "2021"
 
 [dependencies]
 cortex-m = { path = "..", version = ">= 0.5.6, < 0.8" }