Require hatchling>=1.27 to understand the license and license-files expressions in pyproject.toml

Updated hatchling version requirement and added license file reference.

Author: eduardo-rodrigues

pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["hatchling", "hatch-vcs"]
+requires = ["hatchling>=1.27", "hatch-vcs"]
 build-backend = "hatchling.build"
 
 [project]
@@ -15,6 +15,7 @@ maintainers = [
     { name = "Scikit-HEP", email = "scikit-hep-admins@googlegroups.com" },
 ]
 license = "BSD-3-Clause"
+license-files = ["LICENSE"]
 keywords = [
     "HEP",
     "MC identification codes",