v1.4.28

What's Changed

• PPF-650: remove the linting ignore in filler.py by @chinapandaman in #651
• PPF-648: fully remove deprecated features in 1.4.0 by @chinapandaman in #652
• PPF-649: add more tests for Adobe mode by @chinapandaman in #653
• PPF-615: create developer guide docs by @chinapandaman in #655
• PPF-656: release 1.4.28 by @chinapandaman in #657

Full Changelog: v1.4.27...v1.4.28