Ignore needless_lifetimes clippy lint

    warning: the following explicit lifetimes could be elided: 'a
      --> src/main.rs:77:12
       |
    77 | impl<'ast, 'a> Visit<'ast> for AttrVisitor<'a> {
       |            ^^                              ^^
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_lifetimes
       = note: `-W clippy::needless-lifetimes` implied by `-W clippy::all`
       = help: to override `-W clippy::all` add `#[allow(clippy::needless_lifetimes)]`
    help: elide the lifetimes
       |
    77 - impl<'ast, 'a> Visit<'ast> for AttrVisitor<'a> {
    77 + impl<'ast> Visit<'ast> for AttrVisitor<'_> {
       |

src/main.rs

@@ -5,6 +5,7 @@
     clippy::items_after_statements,
     clippy::let_underscore_untyped,
     clippy::match_same_arms,
+    clippy::needless_lifetimes,
     clippy::similar_names,
     clippy::too_many_lines,
     clippy::uninlined_format_args,