Seeing errors with pngquant 3.0.3

Seeing this error since the last update to the latest tag:

[rust-builder 4/4] RUN git clone --recursive https://github.com/kornelski/pngquant.git     && cd pngquant     && git checkout 3.0.3     && cargo build --release     && mkdir -p /output     && cp target/release/pngquant /output/
#14 10.74 error[E0308]: mismatched types
#14 10.74    --> rust/bin.rs:206:44
#14 10.74     |
#14 10.74 206 |         unsafe { liq_set_log_callback(liq, log_callback, Default::default()); }
#14 10.74     |                  --------------------      ^^^^^^^^^^^^ expected `Option<...>`, found fn item
#14 10.74     |                  |
#14 10.74     |                  arguments to this function are incorrect
#14 10.74     |
#14 10.74     = note: expected enum `Option<for<'a> unsafe extern "C" fn(&'a imagequant_sys::liq_attr, *const i8, imagequant_sys::AnySyncSendPtr)>`
#14 10.74             found fn item `for<'a> unsafe extern "C" fn(&'a imagequant_sys::liq_attr, *const i8, imagequant_sys::AnySyncSendPtr) {log_callback}`
#14 10.74 note: function defined here
#14 10.74    --> lib/imagequant-sys/src/ffi.rs:217:26
#14 10.74     |
#14 10.74 217 | pub unsafe extern "C" fn liq_set_log_callback(attr: &mut liq_attr, callback: Option<liq_log_callback_function>, user_info: AnySyncS...
#14 10.74     |                          ^^^^^^^^^^^^^^^^^^^^
#14 10.74 help: try wrapping the expression in `Some`
#14 10.74     |
#14 10.74 206 |         unsafe { liq_set_log_callback(liq, Some(log_callback), Default::default()); }
#14 10.74     |                                            +++++            +
#14 10.74 
#14 10.75 For more information about this error, try `rustc --explain E0308`.
#14 10.75 error: could not compile `pngquant` (bin "pngquant") due to 1 previous error
#14 ERROR: process "/bin/sh -c git clone --recursive https://github.com/kornelski/pngquant.git     && cd pngquant     && git checkout 3.0.3     && cargo build --release     && mkdir -p /output     && cp target/release/pngquant /output/" did not complete successfully: exit code: 101

This breaks our CI/CD pipeline. Can anyone support here with this?

Reproduce the failure using the Docker build command in the report with pngquant tag 3.0.3. Inspect rust/bin.rs around line 206 and lib/imagequant-sys/src/ffi.rs around line 217 to understand the callback type mismatch; the work is done when the pngquant release build completes successfully.