Choose modern license format

Author: dbieber

pyproject.toml

@@ -1,13 +1,13 @@
 [build-system]
-requires = ["setuptools>=45", "wheel"]
+requires = ["setuptools>=77.0.0", "wheel"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "fire"
 version = "0.7.1"
 description = "A library for automatically generating command line interfaces."
 readme = "README.md"
-license = {text = "Apache-2.0"}
+license = "Apache-2.0"
 authors = [
     {name = "David Bieber", email = "dbieber@google.com"}
 ]