fix: consider extension when deduping outputs

Author: danielroe

src/make.ts

@@ -103,7 +103,14 @@ export async function mkdist(
  basename(output.path, extname(output.path)) + output.extension;
  output.path = join(dirname(output.path), renamed);
  // Avoid overriding files with original extension
- if (outputs.some((o) => o !== output && o.path === output.path)) {
+ if (
+ outputs.some(
+ (o) =>
+ o !== output &&
+ o.path === output.path &&
+ (!o.extension || o.extension === output.extension),
+ )
+ ) {
  output.skip = true;
  }
  }