Bump pypdfium2 from 4.18.0 to 5.1.0

[dependabot]

Bumps pypdfium2 from 4.18.0 to 5.1.0.

Release notes

Sourced from pypdfium2's releases.

5.1.0

Changes (Release 5.1.0)

Summary (pypdfium2)

• Added new helpers textpage.get_textobj(), PdfTextObj and PdfFont. These helpers currently just cover font info and object-level text extraction, but may be extended in the future. For objects of type FPDF_PAGEOBJ_TEXT, PdfPage.get_objects() and the PdfObject constructor will now return PdfTextObj rather than just PdfObject instances. Thanks to Mykola Skrynnyk for the initial proposal.
• Rolled back musllinux tag from 1_2 to 1_1. This was erroneously incremented shortly before 5.0.0, but the pdfium-binaries do still run on musllinux_1_1, probably because they're statically linked.
• build_toolchained: Significant portability enhancements. Should now work on Linux CPUs that are unhandled/incomplete upstream (e.g. aarch64). Also, building on Windows arm64 natively may now work. Added ability to cross-compile ppc64le from x86_64. Removed --use-syslibs option (use build_native instead).
• build_native: Fixed Python 3.6/3.7 compatibility. Added --no-libclang-rt option.
• Setup: Fixed inclusion of BUILD_LICENSES/ sub-directories. Added extra licenses for DLLs pulled in by auditwheel. This concerns sourcebuilds/cibuildwheel only. The wheels on PyPI are unaffected.
• Added android targets to sbuild.yaml workflow. This does not impact releases, which still use the pdfium-binaries.
• Added i686 (manylinux and musllinux) to cibuildwheel workflow. Use an arm64 host (GHA ubuntu-24.04-arm) for armv7l builds, which is much faster than with an x86_64 host. Added armv7l manylinux target (previously just musllinux). This does not impact releases yet, but it may in the future.
• CI: Migrated from macos-13 to macos-15-intel.

Commits between 5.0.0 and 5.1.0 (latest commit first):

• 46afdae [autorelease main] update 5.1.0
• d6d1ea5 build_toolchained: set config var regardless of sync
• 1054d12 Update RTD build host
• 0c2eef0 build_toolchained: update comment
• 346bba0 build_toolchained: use PORTABLE_MODE on musllinux and android
• edad47e main.yaml: add ref to upload-artifact bug
• 24aea3c Update changelog again
• 6bc04d3 main.yaml: propagate py_version
• 28639a5 Add a comment
• 5c93651 Readme: update sourcebuild section
• 49404d2 Fix reuse lint
• 7cb5bc0 Fix bootstrap_ninja()
• b4f2bc6 Extract non-split-related work from PR #394
• d839e2e Defer _get_local_bin()
• 6be8ad0 build_toolchained: in PORTABLE_MODE, use bootstrap_buildtools()
• 6fb248b Make bootstrap_gn target dir portable
• 1613353 Add proper ninja/gn bootstrapping functions
• 6ec44e2 Avoid setup-just action where we can
• 0cd1f73 Update changelog again
• 5fc9bb0 sbuild_one: fix artifact naming if target_os is set
• 3998f82 pdfium-binaries/android: bump to android_23
• a645230 sbuild.yaml: attempt adding android builds
• c739b22 build_toolchained: continue
• a86826f build_toolchained: limit PORTABLE_MODE to Linux for now

... (truncated)

Commits

• 46afdae [autorelease main] update 5.1.0
• d6d1ea5 build_toolchained: set config var regardless of sync
• 1054d12 Update RTD build host
• 0c2eef0 build_toolchained: update comment
• 346bba0 build_toolchained: use PORTABLE_MODE on musllinux and android
• edad47e main.yaml: add ref to upload-artifact bug
• 24aea3c Update changelog again
• 6bc04d3 main.yaml: propagate py_version
• 28639a5 Add a comment
• 5c93651 Readme: update sourcebuild section
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)