bump version to 0.2.1

- Update Cargo.toml version
- Update .deb URL in README
- Fix version test to use CARGO_PKG_VERSION instead of hardcoded string

Author: nwyin

Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "dw2md"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 authors = ["nwyin <nwyin@hey.com>"]
 description = "Crawl a DeepWiki repository and compile all pages into a single, LLM-friendly markdown file"

Cargo.toml

@@ -25,8 +25,8 @@ brew install tnguyen21/dw2md/dw2md
 ### Debian/Ubuntu (.deb)
 
 ```bash
-curl -LO https://github.com/tnguyen21/dw2md/releases/latest/download/dw2md_0.2.0_amd64.deb
-sudo dpkg -i dw2md_0.2.0_amd64.deb
+curl -LO https://github.com/tnguyen21/dw2md/releases/latest/download/dw2md_0.2.1_amd64.deb
+sudo dpkg -i dw2md_0.2.1_amd64.deb
 ```
 
 ### From source

README.md

@@ -19,7 +19,7 @@ fn test_version_flag() {
     let output = dw2md().arg("--version").output().unwrap();
     assert!(output.status.success());
     let stdout = String::from_utf8(output.stdout).unwrap();
-    assert!(stdout.contains("0.2.0"));
+    assert!(stdout.contains(env!("CARGO_PKG_VERSION")));
 }
 
 #[test]