Unable to compile("0.8.30")

[happygrammer]

Unable to compile("cargo build --release")

[dependencies]
encoding_rs = "0.8.30"

$ cargo build --release
warning: trait objects without an explicit dyn are deprecated
--> src/main.rs:44:32
|
44 | read: &mut Read,
| ^^^^ help: use dyn: dyn Read
|
= note: #[warn(bare_trait_objects)] on by default
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html

warning: trait objects without an explicit dyn are deprecated
--> src/main.rs:45:33
|
45 | write: &mut Write,
| ^^^^^ help: use dyn: dyn Write
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html

warning: trait objects without an explicit dyn are deprecated
--> src/main.rs:139:33
|
139 | read: &mut Read,
| ^^^^ help: use dyn: dyn Read
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html

warning: trait objects without an explicit dyn are deprecated
--> src/main.rs:140:34
|
140 | write: &mut Write,
| ^^^^^ help: use dyn: dyn Write
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html

warning: trait objects without an explicit dyn are deprecated
--> src/main.rs:220:23
|
220 | read: &mut Read,
| ^^^^ help: use dyn: dyn Read
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html

warning: trait objects without an explicit dyn are deprecated
--> src/main.rs:221:24
|
221 | write: &mut Write,
| ^^^^^ help: use dyn: dyn Write
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html

warning: trait objects without an explicit dyn are deprecated
--> src/main.rs:277:38
|
277 | &mut stdout_lock as &mut Write
| ^^^^^ help: use dyn: dyn Write
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html

warning: trait objects without an explicit dyn are deprecated
--> src/main.rs:283:39
|
283 | &mut file as &mut Write
| ^^^^^ help: use dyn: dyn Write
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html

warning: recode_rs (bin "recode_rs") generated 8 warnings
Finished release [optimized] target(s) in 0.07s