fix: remove unstable feature

Cargo.lock

@@ -1786,7 +1786,7 @@ checksum = "7bd3e3206899af3f8b12af284fafc038cc1dc2b41d1b89dd17297221c5d225de"
 
 [[package]]
 name = "site_icons"
-version = "0.6.2"
+version = "0.6.3"
 dependencies = [
  "byteorder",
  "cached",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "site_icons"
-version = "0.6.2"
+version = "0.6.3"
 authors = ["Sam Denty <sam@samdenty.com>"]
 edition = "2018"
 license = "GPL-3.0"

src/lib.rs

@@ -1,4 +1,3 @@
-#![feature(async_closure)]
 #![allow(unused_imports)]
 //! # site_icons
 //! An efficient website icon scraper.

src/manifest.rs

@@ -41,7 +41,7 @@ async fn load_manifest_cached(url: Url) -> Result<Vec<Icon>, String> {
     .map_err(|e| format!("{}: {:?}", url, e))?;
 
   Ok(
-    join_all(manifest.icons.into_iter().map(async move |icon| {
+    join_all(manifest.icons.into_iter().map(|icon| async move {
       if let Ok(src) = url.join(&icon.src) {
         Icon::load(src, IconKind::AppIcon, icon.sizes).await.ok()
       } else {