What's Changed
* PPF-427: renaming element to widget by chinapandaman in https://github.com/chinapandaman/PyPDFForm/pull/428
* PPF-429: renaming PyPDFForm object to PdfWrapper by chinapandaman in https://github.com/chinapandaman/PyPDFForm/pull/430
* PPF-431: temporarily make deprecated features backward compatible by chinapandaman in https://github.com/chinapandaman/PyPDFForm/pull/432
* PPF-433: change generate_schema() to schema by chinapandaman in https://github.com/chinapandaman/PyPDFForm/pull/434
* PPF-435: release 1.4.0 by chinapandaman in https://github.com/chinapandaman/PyPDFForm/pull/436
**Full Changelog**: https://github.com/chinapandaman/PyPDFForm/compare/v1.3.5...v1.4.0