spacetelescope/synphot_refactor: 1.2.0 Release Notes

Also see CHANGES.rst What's Changed MNT: Stop using enable_deprecations_as_exceptions by @pllim in https://github.com/spacetelescope/synphot_refactor/pull/325 Drop Python 3.6 and 3.7, update test workflows by @pllim in https://github.com/spacetelescope/synphot_refactor/pull/330 Separate VEGAMAG and OBMAG by @pllim in https://github.com/spacetelescope/synphot_refactor/pull/331 Initial port of tynt to filter_parameterization subpackage by @pllim in https://github.com/spacetelescope/synphot_refactor/pull/257 Enforce little endian when reading Numpy test data file by @olebole in https://github.com/spacetelescope/synphot_refactor/pull/336 Remove AstroConda installation instructions by @ojustino in https://github.com/spacetelescope/synphot_refactor/pull/338 use canonical filename of RTD configuration and enable nitpicky mode by @zacharyburnett in https://github.com/spacetelescope/synphot_refactor/pull/337 MNT: Bump required deps, update workflows by @pllim in https://github.com/spacetelescope/synphot_refactor/pull/341 TST: Pin to tox