Bump version to 0.3.0

Bumps the version and includes the SCHED_DEADLINE support for Linux.

Author: iddm

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "thread-priority"
-version = "0.2.5"
+version = "0.3.0"
 authors = ["Victor Polevoy <[email protected]>"]
 description = "Library for managing threads priority and schedule policies"
 repository = "https://github.com/vityafx/thread-priority"