Added toml file

Author: Kazuki Suzuki Przyborowski

pyproject.toml

@@ -0,0 +1,11 @@
+[project]
+    name = "PyUPC-EAN"
+    version = "2.20.0"
+    readme = "README.md"
+    license = { text = "BSD-3-Clause" }
+    keywords = []
+    description = "A barcode library/module for python."
+    authors = [
+        { name = "Kazuki Przyborowski", email = "kazuki.przyborowski@gmail.com" },
+    ]
+    

setup.py

@@ -197,6 +197,26 @@ def pillow_installed():
     verinfofile.write(verinfodata)
     verinfofile.close()
 
+if(len(sys.argv) > 1 and (sys.argv[1] == "buildcfg" or sys.argv[1] == "makecfg")):
+    outcfgvar = """[project]
+    name = "{}"
+    version = "{}"
+    readme = "README.md"
+    license = {{ text = "BSD-3-Clause" }}
+    keywords = []
+    description = "{}"
+    authors = [
+        {{ name = "{}", email = "{}" }},
+    ]
+    """.format(pymodule['name'], pymodule['version'], pymodule['description'], pymodule['author'], pymodule['authoremail'])
+    mytoml = open("./pyproject.toml", "w")
+    mytoml.write(outcfgvar)
+    mytoml.flush()
+    if(hasattr(os, "sync")):
+        os.fsync(mytoml.fileno())
+    mytoml.close()
+    sys.exit()
+
 setup(
     name=pymodule['name'],
     version=pymodule['version'],