chore: Prepare 0.13.0 release

linux-loader 0.13.0 incorporates:

- Introduce RISC-V64 architecture support.
- Updated vm-memory to 0.16.0.
- Re-organize `loader`, `configurator` and `benches` module layout,
  leaving original interface intact.

Signed-off-by: Ruoqing He <heruoqing@iscas.ac.cn>

CHANGELOG.md

@@ -1,12 +1,15 @@
 # Upcoming Release
 
+# [v0.13.0]
+
 ## Added
 
 - [[#190](https://github.com/rust-vmm/linux-loader/pull/190)] Introduce RISC-V64
   architecture support.
 
 ## Changed
 
+- [[#194](https://github.com/rust-vmm/linux-loader/pull/194)] Updated vm-memory to 0.16.0.
 - [[#197](https://github.com/rust-vmm/linux-loader/pull/197)] Re-organize
   `loader`, `configurator` and `benches` module layout, leaving original interface
   intact.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "linux-loader"
-version = "0.12.0"
+version = "0.13.0"
 authors = [
     "The rust-vmm maintainers",
     "rust-vmm AWS maintainers <rust-vmm-maintainers@amazon.com>",