Ignore clippy::struct_field_names lint

```
error: field name ends with the struct's name
  --> src/cli.rs:29:5
   |
29 |     pub(crate) cargo_args: Vec<String>,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#struct_field_names
   = note: `-D clippy::struct-field-names` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::struct_field_names)]`
```

src/main.rs

@@ -2,7 +2,7 @@
 
 #![forbid(unsafe_code)]
 #![warn(rust_2018_idioms, single_use_lifetimes, unreachable_pub, clippy::pedantic)]
-#![allow(clippy::too_many_lines, clippy::single_match_else)]
+#![allow(clippy::too_many_lines, clippy::single_match_else, clippy::struct_field_names)]
 
 #[macro_use]
 mod term;