v1.4.10

What's Changed

• PPF-500: add serve docs to Makefile by @chinapandaman in #501
• PPF-502: supports signature field by @chinapandaman in #504
• PPF-503: update docs for filling signature field by @chinapandaman in #505
• PPF-506: fix filler logic for signature by @chinapandaman in #507
• PPF-508: add bump version script by @chinapandaman in #509

Full Changelog: v1.4.9...v1.4.10