perf: don't negate all file types in ignore's TypesBuilder (#176)

Negating all file types has a huge impact on the time required to
construct the underlying regex and is not required (because no type is
selected by default). This improves the performance massively!

Author: beeb

crates/lintspec/src/files.rs

@@ -35,7 +35,6 @@ pub fn find_sol_files<T: AsRef<Path>>(
     // types filter to only consider Solidity files
     let types = TypesBuilder::new()
         .add_defaults()
-        .negate("all")
         .select("solidity")
         .build()
         .expect("types builder should build");