use rust,ignore code fences in readme.md (fix #34)

so that we no longer need to add `--skip` on `cargo test`

.github/workflows/ci.yml

@@ -14,10 +14,7 @@ jobs:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
-      - run: cargo test --features=search -- --skip src/lib.rs
-        if: ${{ matrix.os != 'windows-latest' }}
-      - run: cargo test --features=search -- --skip src\lib.rs
-        if: ${{ matrix.os == 'windows-latest' }}
+      - run: cargo test --features=search
       - run: cargo test --no-default-features --features=ratatui-crossterm,search -- --skip .rs
       - run: cargo test --no-default-features --features=your-backend,search -- --skip .rs
       - run: cargo test --no-default-features --features=ratatui-your-backend,search -- --skip .rs