v1.4.0

What's Changed

• PPF-427: renaming element to widget by @chinapandaman in #428
• PPF-429: renaming PyPDFForm object to PdfWrapper by @chinapandaman in #430
• PPF-431: temporarily make deprecated features backward compatible by @chinapandaman in #432
• PPF-433: change generate_schema() to schema by @chinapandaman in #434
• PPF-435: release 1.4.0 by @chinapandaman in #436

Full Changelog: v1.3.5...v1.4.0