MSRV: 1.56.1 => 1.68.0

This is required since I use uefi-raw which depends on uguid 2.0.0 which
has a MSRV of 1.60.0. uefi-raw itself has a dependency on
rust 1.68.0

.github/workflows/rust.yml

@@ -20,7 +20,7 @@ jobs:
     name: build (msrv)
     uses: ./.github/workflows/_build-rust.yml
     with:
-      rust-version: 1.56.1
+      rust-version: 1.68.0 # MSRV
       do-style-check: false
       features: builder
 
@@ -46,7 +46,7 @@ jobs:
     needs: build_msrv
     uses: ./.github/workflows/_build-rust.yml
     with:
-      rust-version: 1.56.1
+      rust-version: 1.68.0 # MSRV
       do-style-check: false
       rust-target: thumbv7em-none-eabihf
       features: builder
@@ -102,7 +102,7 @@ jobs:
     needs: build_msrv
     uses: ./.github/workflows/_build-rust.yml
     with:
-      rust-version: 1.56.1
+      rust-version: 1.68.0 # MSRV
       do-style-check: true
       do-test: false
       features: builder

multiboot2-header/Cargo.toml

@@ -26,6 +26,7 @@ readme = "README.md"
 homepage = "https://github.com/rust-osdev/multiboot2-header"
 repository = "https://github.com/rust-osdev/multiboot2"
 documentation = "https://docs.rs/multiboot2-header"
+rust-version = "1.60"
 
 [[example]]
 name = "minimal"

multiboot2-header/Changelog.md

@@ -1,7 +1,7 @@
 # CHANGELOG for crate `multiboot2-header`
 
 ## Unreleased
-- MSRV is 1.56.1
+- MSRV is 1.68.0
 - renamed the `std` feature to `alloc`
 - added the optional `unstable` feature (requires nightly)
   - implement `core::error::Error` for `LoadError`

multiboot2/Cargo.toml

@@ -31,6 +31,7 @@ readme = "README.md"
 homepage = "https://github.com/rust-osdev/multiboot2"
 repository = "https://github.com/rust-osdev/multiboot2"
 documentation = "https://docs.rs/multiboot2"
+rust-version = "1.60"
 
 [features]
 default = ["builder"]

multiboot2/Changelog.md

@@ -13,6 +13,7 @@
   `uefi_raw::table::boot::MemoryDescriptor`
 - `EFIMemoryAreaType` was removed and is now an alias of
   `uefi_raw::table::boot::MemoryType`
+- MSRV is 1.68.0
 
 ## 0.15.1 (2023-03-18)
 - **BREAKING** `MemoryMapTag::all_memory_areas()` was renamed to `memory_areas`