unnecessary_reserve: lint configuration

Author: wowinter13

book/src/lint_configuration.md

@@ -778,6 +778,7 @@ The minimum rust version that the project supports. Defaults to the `rust-versio
 * [`unchecked_duration_subtraction`](https://rust-lang.github.io/rust-clippy/master/index.html#unchecked_duration_subtraction)
 * [`uninlined_format_args`](https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args)
 * [`unnecessary_lazy_evaluations`](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_lazy_evaluations)
+* [`unnecessary_reserve`](https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_reserve)
 * [`unnested_or_patterns`](https://rust-lang.github.io/rust-clippy/master/index.html#unnested_or_patterns)
 * [`unused_trait_names`](https://rust-lang.github.io/rust-clippy/master/index.html#unused_trait_names)
 * [`use_self`](https://rust-lang.github.io/rust-clippy/master/index.html#use_self)