deps(rust): update lopdf requirement from 0.38 to 0.39 in the rust-dependencies group

[dependabot]

Updates the requirements on lopdf to permit the latest version.
Updates lopdf to 0.39.0

Changelog

Sourced from lopdf's changelog.

v0.38.0 (2025-08-26)

Add

• Add enhanced PDF decryption support for encrypted documents with empty passwords
• Add automatic decryption during document loading for better pdftk compatibility
• Add raw object extraction before parsing to handle encrypted content
• Add support for decrypting PDFs with compressed object streams
• Add comprehensive test suite for PDF decryption functionality
• Add assets/encrypted.pdf test file for decryption testing
• Add examples demonstrating decryption capabilities (test_decryption.rs, verify_decryption.rs)

Enhance

• Enhance Reader::read() to detect and handle encrypted PDFs automatically
• Enhance document loading to attempt empty password authentication by default
• Enhance object processing to decrypt objects after parsing
• Enhance support for encrypted PDFs containing object streams

Fix

• Fix encrypted object parsing by extracting raw bytes before decryption
• Fix object stream handling in encrypted documents
• Fix decryption workflow to match pdftk's approach

Implementation Details

• Modified src/reader.rs to add load_encrypted_document() method
• Added extract_raw_object() method for raw byte extraction
• Added parse_raw_object() method for parsing extracted bytes
• Store raw object bytes in Reader::raw_objects field for deferred decryption
• Process compressed objects from object streams after decryption

v0.37.0 (2025-08-08)

Add

• Add complete PDF object streams write support enabling 11-61% file size reduction (#XXX)
• Add save_modern() method for easy object streams and cross-reference streams usage
• Add SaveOptions struct with builder pattern for configuring compression settings
• Add ObjectStreamBuilder for creating object streams programmatically
• Add cross-reference stream support for PDF 1.5+ compliance
• Add replace_partial_text() function for partial text replacement in PDFs
• Add comprehensive test suite with 50+ tests for object streams functionality
• Add object streams write capability (previously read-only)
• Add implementation documentation in OBJECT_STREAMS_IMPLEMENTATION.md

... (truncated)

Commits

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