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

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

.cargo/config.toml

@@ -1,3 +1,3 @@
 [alias]
 watch-check = ["watch", "-x", "clippy --features ratatui-crossterm,search --no-default-features --examples --tests", "-x", "clippy --features search --examples --tests"]
-watch-test = ["watch", "-x", "test --features=search -- --skip=src/lib.rs", "-w", "src", "-w", "tests"]
+watch-test = ["watch", "-x", "test --features=search", "-w", "src", "-w", "tests"]