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Update expat version in Superbuild

Merged Cédric Traizet requested to merge update_superbuild_expat into develop

Summary

Update the expat version in Superbuild to v2.3.0 and use VS 2019 in Windows CI

Rationale

Because of security issues, the current version of EXPAT should not be used anymore. The version have been updated to 2.3.0.

This version does not compile with VC14 (2015), therefore the VS studio version in Windows CI has been updated to VC14.20 (VS 2019). Note that this change is also required to use the C++17 standard (see !799)

Implementation Details

This is a backport of the work done by @thibrom in the release-7.3 branch.

Additional notes

See https://github.com/libexpat/libexpat/blob/R_2_2_8/expat/Changes#L6

Copyright

The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.

Check before merging:

  • All discussions are resolved
  • At least 2 👍 votes from core developers, no 👎 vote.
  • The feature branch is (reasonably) up-to-date with the base branch
  • Dashboard is green
  • Copyright owner has signed the ORFEO ToolBox Contributor License Agreement
  • Optionally, run git diff develop... -U0 --no-color | clang-format-diff.py -p1 -i on latest changes and commit
Edited by Cédric Traizet