added build tool flit

Author: Wail Samjouni

pyproject.toml

@@ -38,9 +38,9 @@ line-length = 88
 target-version = ['py310']
 
 #[build-system]
-#requires = ["setuptools >= 50.0.0", "wheel"]
-#build-backend = "setuptools.build_meta"
+#requires = ["flit_core >=2"]
+#build-backend = "flit_core.buildapi"
 
 [build-system]
-requires = ["flit_core >=2"]
-build-backend = "flit_core.buildapi"
+requires = ["flit"]
+build-backend = "flit.api"