add "License :: OSI Approved :: NASA Open Source Agreement (NOSA)" (#167)

* added NOSA

* Update src/trove_classifiers/__init__.py

---------

Co-authored-by: John (EBo) David <[email protected]>
Co-authored-by: Dustin Ingram <[email protected]>

Author: 3 people

src/trove_classifiers/__init__.py

@@ -312,6 +312,7 @@
     "License :: OSI Approved :: Mozilla Public License 1.1 (MPL 1.1)",
     "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)",
     "License :: OSI Approved :: Mulan Permissive Software License v2 (MulanPSL-2.0)",
+    "License :: OSI Approved :: NASA Open Source Agreement v1.3 (NASA-1.3)",
     "License :: OSI Approved :: Nethack General Public License",
     "License :: OSI Approved :: Nokia Open Source License",
     "License :: OSI Approved :: Open Group Test Suite License",