fix: clippy::wrong_self_convention warning for fields with is_ prefix etc.

[nicmue]

When having a field which has one of the prefixes listed by clippy::wrong_self_convention you will end up getting said lint warning in your bon::Builder macro:

#[derive(Builder)]
struct Unique {
    is_unique: bool,
}

warning: methods called `is_*` usually take `self` by mutable reference or `self` by reference or no `self`
 --> src/main.rs:7:10
  |
7 | #[derive(Builder)]
  |          ^^^^^^^
  |
  = help: consider choosing a less ambiguous name
  = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#wrong_self_convention
  = note: `#[warn(clippy::wrong_self_convention)]` on by default
  = note: this warning originates in the derive macro `Builder` (in Nightly builds, run with -Z macro-backtrace for more info)

This PR proposes to add #[allow(clippy::wrong_self_convention)] to all generated setters to avoid this lint warning entirely.

[Veetaha]

Makes sense, thanks! I'll make a patch

[Veetaha]

Released in 3.8.1