message: Update the changelog (pre-0.7.0)
diff: # Changelog
  +## 0.7.0
  +
  +### Added
  +
  +- HDF5 C library can now be built from source and linked in statically, enabled
  + via `hdf5-sys/static` feature (as of this release, the version of the bundled
  + sources of the library is 1.10.6). CMake is required for building. For further
  + details, see the docs for `hdf5-sys`.
  +- Thanks to static build option, the documentation will now be built on
  + [docs.rs](https://docs.rs/crate/hdf5); if it builds successfully, this
  + will be the official documentation source from now on.
  +- Add support for HDF5 1.12 on all platforms and include it in CI.
  +
  +### Changed
  +
  +- Switched CI from Travis/AppVeyor to GitHub Actions; for each pull request, we
  + now run around 30 concurrent builds which provides with a much wider coverage
  + than previously and has already revealed some issues that have been fixed.
  + Platforms covered: macOS 10.15, Windows Server 2019, Ubuntu 16.04/18.04/20.04;
  + HDF5 installation methods covered: conda, apt, homebrew, also official
  + binaries on Windows. We now also test MPI versions of the library for
  + both MPICH and OpenMPI on macOS / Linux.
  +
  +### Fixed
  +
  +- We now force the variable-length allocator that HDF5 uses when reading data
  + to use `libc::malloc` and `libc::free`, so that they can be deallocated
  + properly by `VarLenString` and `VarLenArray` in `hdf5-types`. Previously,
  + this could cause a rare but serious failure for Windows builds when the
  + default allocator used for vlen types by HDF5 was not matching the
  + libc deallocator.
  +- Use `std::panic::catch_unwind` in all cases where we uses extern C callbacks,
  + so that they are panic-safe.
  +- `Reader::read_raw` and `Reader::read_slice` should now be `Drop`-safe in the
  + event where the read operation fails and the destination type is not trivial.
  +
  ## 0.6.1
  ### Added
  -- HDF5 C library can now be built and statically linked to `hdf5-sys`
  - crate by enabling `hdf5-sys/static` feature (CMake required).
  - Implement `Default` for `H5D_layout_t`, `H5D_alloc_time_t`, `H5T_cset_t`,
  `H5D_fill_time_t`, `H5D_fill_value_t` (based on what their values are set
  to in default property lists).
  