Resolve clippy lints

Author: Ralith

src/cache.rs

@@ -162,7 +162,7 @@ impl Manager {
                 ChunkState {
                     chunk,
                     slot,
-                    renderable: slot.map_or(false, |idx| self.chunks[idx as usize].ready),
+                    renderable: slot.is_some_and(|idx| self.chunks[idx as usize].ready),
                 },
             );
         }
@@ -224,7 +224,7 @@ impl Manager {
         let children_renderable = chunk.renderable // this subtree should be rendered at all, and
             && child_slots                         // every child is already resident in the cache
             .iter()
-            .all(|slot| slot.map_or(false, |x| self.chunks[x as usize].ready));
+            .all(|slot| slot.is_some_and(|x| self.chunks[x as usize].ready));
         // If this subtree should be rendered and the children can't be rendered, this chunk must be rendered.
         if chunk.renderable && !children_renderable {
             self.render

src/cubemap.rs

@@ -886,7 +886,7 @@ where
     fn size_hint(&self) -> (usize, Option<usize>) {
         let total = self.chunk_resolution * self.chunk_resolution;
         let remaining = (total - self.index) as usize;
-        let x = (remaining + S::LANES - 1) / S::LANES;
+        let x = remaining.div_ceil(S::LANES);
         (x, Some(x))
     }
 }