Update version to 0.1.8 (#24)

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "dadk"
 authors = ["longjin <longjin@DragonOS.org>", "chikejian <chikejian@DragonOS.org>"]
-version = "0.1.7"
+version = "0.1.8"
 edition = "2021"
 description = "DragonOS Application Development Kit\nDragonOS应用开发工具"
 license = "GPL-2.0-only"