Update pyproject.toml

Author: tekktrik

optional_requirements.txt

@@ -0,0 +1,3 @@
+# SPDX-FileCopyrightText: 2022 Alec Delaney, for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense

pyproject.toml

@@ -12,7 +12,7 @@ requires = [
 [project]
 name = "circuitpython-csv"
 description = "CircuitPython helper library for working with CSV files"
-version = "0.0.0-auto.0"
+version = "0.0.0+auto.0"
 readme = "README.rst"
 authors = [
     {name = "Alec Delaney", email = "[email protected]"}
@@ -36,10 +36,11 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
 ]
-dynamic = ["dependencies"]
+dynamic = ["dependencies", "optional-dependencies"]
 
 [tool.setuptools]
 py-modules = ["circuitpython_csv"]
 
 [tool.setuptools.dynamic]
 dependencies = {file = ["requirements.txt"]}
+optional-dependencies = {optional = {file = ["optional_requirements.txt"]}}