Fixes a bunch of clippy warnings, adds clippy to CI

src/static_data/libraries/species_library.rs

@@ -42,7 +42,7 @@ pub mod tests {
     use crate::static_data::StaticStatisticSet;
     use hashbrown::HashSet;
 
-    fn build_species<'a>() -> Species {
+    fn build_species() -> Species {
         Species::new(
             0,
             &"foo".into(),
@@ -65,7 +65,7 @@ pub mod tests {
         )
     }
 
-    pub fn build<'a>() -> SpeciesLibrary {
+    pub fn build() -> SpeciesLibrary {
         let mut lib = SpeciesLibrary::new(1);
         let species = build_species();
         // Borrow as mut so we can insert

src/static_data/libraries/static_data.rs

@@ -76,7 +76,7 @@ impl StaticData {
     pub fn abilities(&self) -> &AbilityLibrary {
         &self.abilities
     }
-    pub fn abilities_mut<'a>(&'a mut self) -> &'a mut AbilityLibrary {
+    pub fn abilities_mut(&mut self) -> &mut AbilityLibrary {
         &mut self.abilities
     }
 }
@@ -90,7 +90,7 @@ pub mod test {
     };
     use crate::static_data::natures;
 
-    pub fn build<'a>() -> StaticData {
+    pub fn build() -> StaticData {
         StaticData {
             settings: LibrarySettings::new(100),
             species: species_library::tests::build(),