Ignore clippy::lines_filter_map_ok lint

rust-lang/rust-clippy#14127

```
warning: `filter_map()` will run forever if the iterator repeatedly produces an `Err`
  --> src/cargo.rs:95:10
   |
95 |         .filter_map(|line| line.ok())
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `map_while(Result::ok)`
   |
note: this expression returning a `std::io::Lines` may produce an infinite number of `Err` in case of a read error
  --> src/cargo.rs:93:5
   |
93 | /     reader
94 | |         .lines()
   | |________________^
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#lines_filter_map_ok
   = note: `#[warn(clippy::lines_filter_map_ok)]` on by default
```

src/lib.rs

@@ -130,6 +130,8 @@
 //! [trybuild]: https://github.com/dtolnay/trybuild
 //! [`cargo expand`]: https://github.com/dtolnay/cargo-expand
 
+#![allow(clippy::lines_filter_map_ok)] // https://github.com/rust-lang/rust-clippy/issues/14127
+
 #[macro_use]
 mod path;