Grib2io-interp

What's Changed
* Added support for interpolation from Rotated Lat/Lon Arakawa grid when building with [NCEPLIBS-ip v5.1.0](https://github.com/NOAA-EMC/NCEPLIBS-ip/releases/tag/v5.1.0) (or newer) by EricEngle-NOAA in a02dd51. Additional information can be found [here](https://noaa-mdl.github.io/grib2io-interp/grib2io_interp.html#ncep-grid-template-32769).
* Set grib2io as a dependency by TimothyCera-NOAA in https://github.com/NOAA-MDL/grib2io-interp/pull/13
* Have custom `find_library()` in `setup.py` search through `LD_LIBRARY_PATH` when necessary by TimothyCera-NOAA in https://github.com/NOAA-MDL/grib2io-interp/pull/8
* Clean up setup.py by EricEngle-NOAA in https://github.com/NOAA-MDL/grib2io-interp/pull/16
* Added build testing for macOS by TimothyCera-NOAA in https://github.com/NOAA-MDL/grib2io-interp/pull/8 and EricEngle-NOAA in https://github.com/NOAA-MDL/grib2io-interp/pull/16

New Contributors
* TimothyCera-NOAA made their first contribution in https://github.com/NOAA-MDL/grib2io-interp/pull/13

**Full Changelog**: https://github.com/NOAA-MDL/grib2io-interp/compare/v1.2.2...v1.3.0

What's Changed
* Changed behavior in `setup.py` to always dynamically link to the OpenMP library regardless of whether linking to NCEPLIBS-ip (and sp if needed) is static or dynamic.

**Full Changelog**: https://github.com/NOAA-MDL/grib2io-interp/compare/v1.2.1...v1.2.2

What's Changed
* Added check in setup.py for LLVM-OpenMP library, `libomp`

**Full Changelog**: https://github.com/NOAA-MDL/grib2io-interp/compare/v1.2.0...v1.2.1

What's Changed
* Relaxed the required minimum version of NCEPLIBS-ip back to v4.1.0. When building with NCEPLIBS-ip version < 5.0.0, NCEPLIBS-sp will also be required.
* Allow building with static libs by EricEngle-NOAA in https://github.com/NOAA-MDL/grib2io-interp/pull/10
* Allow for user to get and set OpenMP number of threads by EricEngle-NOAA in af2cba4 and d0d83a7
* Added `grib2io_interp.has_openmp_support` bool by EricEngle-NOAA in 79242f8

**Full Changelog**: https://github.com/NOAA-MDL/grib2io-interp/compare/v1.1.0...v1.2.0

What's Changed
* This release is to only update the external library dependency. The only dependency is now is **_NCEPLIBS-ip v5.0.0 or newer._** With NCEPLIBS-ip v5.0.0, NCEPLIBS-sp is no longer a stand-alone library. It has been integrated into NCEPLIBS-ip.

**Full Changelog**: https://github.com/NOAA-MDL/grib2io-interp/compare/v1.0.3...v1.1.0

* Updated `find_library()` in setup.py to provide absolute paths and resolve symlinks and if inside a conda installation (env var `CONDA_PREFIX` is set), use only libs from the conda installation.

**Full Changelog**: https://github.com/NOAA-MDL/grib2io-interp/compare/v1.0.2...v1.0.3