更新版本号至0.3.1，准备发布包含面向对象编程支持的重大更新。

HelloAIXIAOJI · HelloAIXIAOJI · commit 94c48bf94001 · 2025-07-23T00:55:50.000+08:00
diff --git a/Cargo.toml b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "CodeNothing"
-version = "0.2.7"
+version = "0.3.1"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
