build: Bump uart_16550 from 0.2.19 to 0.3.0

Bumps [uart_16550](https://github.com/rust-osdev/uart_16550) from 0.2.19 to 0.3.0.
- [Changelog](https://github.com/rust-osdev/uart_16550/blob/master/Changelog.md)
- [Commits](rust-osdev/uart_16550@v0.2.19...v0.3.0)

---
updated-dependencies:
- dependency-name: uart_16550
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -38,7 +38,7 @@ fdt = "0.1.5"
 chrono = { version = "0.4", default-features = false }
 
 [target.'cfg(target_arch = "x86_64")'.dependencies]
-uart_16550 = "0.2.19"
+uart_16550 = "0.3.0"
 x86_64 = "0.14.10"
 
 [target.'cfg(target_arch = "riscv64")'.dependencies]