v2.3: Several new features and various improvements

New Features:

• Add SZIP support (#435)
• Add option parents to createDataSet (#425)
• Implementing getting the filename dynamically (#424)
• Ability to create soft and external links (#421)
• Generalizing getPath and adding getFile as PathTraits (#417)

Improvements:

• Unified reading/writing attributes and datasets (#450)
• Old compilers have been removed from docker image (#430)
• Cleaning up and improving property lists (#429)
• An example using hdf5 references (#396) (#397)
• Add all property lists alias for completeness (#427)
• Add property CreateIntermediateGroup (#423)
• Add code coverage through codecov.io (#420)
• Introducing GitHub Actions CI (#416)
• Create issue and PR templates (#412)
• Initialize SilenceHDF5 to true in _exist (#411)
• Generalizing xtensor API (#407)
• Minor doc updates (#409)
• Fixing minor error in GH Action (#408)
• Uploading docs to gh-pages using GitHub Actions (#403)
• Various minor documentation updates (#405)
• optional documentation building in cmake (#377)
• From can be automatic now (#384)
• get_dim_vector in inspector (#383)
• Put type_of_array in inspector (#382)
• Move array_dims in the future manipulator (#381)
• Unify interface of H5Attribute with H5Slice_traits (#378)
• Use std::move in NRVO depending of version of GCC (#375)
• Fixed typo '-DD' to '-D' in 'Dependencies'. (#371)
• Changing date format (#364)

Bug fixes:

• Fix use before initialization (#414)
• Adding CMake include guard (#389)