Pypdf

Bug Fixes (BUG)
- Prevent updating page contents after merging page (stamping/watermarking) (1952)
- % to be hex encoded in names (1958)
- Inverse color in CMYK images (1947)
- Dates conversion not working with Z00\'00\' (1946)
- Support UTF-16-LE Strings (1884)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.12.0...3.12.1)

New Features (ENH)
- Add AES support for encrypting PDF files (1918, 1935, 1936, 1938)
- Add page deletion feature to PdfWriter (1843)

Bug Fixes (BUG)
- PdfReader.get_fields() attempts to delete non-existing index "/Off" (1933)
- Remove unused objects when cloning_from (1926)
- Add the TK.SIZE into the trailer (1911)
- add_named_destination() maintains named destination list sort order (1930)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.11.1...3.12.0)

Bug Fixes (BUG)
- Cascaded filters in image objects (1913)
- Append pdf with named destination using numbers for pages (1858)
- Ignore "/B" fields only on pages in PdfWriter.append() (1875)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.11.0...3.11.1)

New Features (ENH)
- Add page_number property (1856)

Bug Fixes (BUG)
- File expansion when updating with Page Contents (1906)
- Missing Alternate in indexed/ICCbased colorspaces (1896)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.10.0...3.11.0)

New Features (ENH)
- Extraction of inline images (1850)
- Add capability to replace image (1849)
- Extend images interface by returning an ImageFile(File) class (1848)
- Add set_data to EncodedStreamObject (1854)

Bug Fixes (BUG)
- Fix RGB FlateEncode Images(PNG) and transparency (1834)
- Generate static appearance for fields (1864)

[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.9.1...3.10.0)

Deprecations (DEP)
- Deprecate PdfMerger (1866)

Bug Fixes (BUG)
- Ignore UTF-8 decode errors (1865)

Robustness (ROB)
- Handle missing /Type entry in Page tree (1859)


[Full Changelog](https://github.com/py-pdf/pypdf/compare/3.9.0...3.9.1)