Merge remote-tracking branch 'origin/master' into release-0.13.3

Author: 197g

src/lib.rs

@@ -113,6 +113,7 @@
 #![cfg(feature = "std")]
 #![allow(clippy::manual_range_contains)]
 #![allow(clippy::new_without_default)]
+extern crate alloc;
 
 mod traits;
 mod common;

src/reader/decoder.rs

@@ -1,11 +1,14 @@
-use std::borrow::Cow;
-use std::cmp;
-use std::default::Default;
+use alloc::borrow::Cow;
+use alloc::boxed::Box;
+use alloc::fmt;
+use alloc::vec::Vec;
+use core::cmp;
+use core::default::Default;
+use core::mem;
+use core::num::NonZeroUsize;
+
 use std::error;
-use std::fmt;
 use std::io;
-use std::mem;
-use std::num::NonZeroUsize;
 
 use crate::common::{AnyExtension, Block, DisposalMethod, Extension, Frame};
 use crate::reader::DecodeOptions;