Migrate to new-style (PEP 621) metadata

Author: sampsyo

pyproject.toml

@@ -1,14 +1,16 @@
 [build-system]
-requires = ["flit_core >=2,<4"]
+requires = ["flit_core >=3.2,<4"]
 build-backend = "flit_core.buildapi"
 
-[tool.flit.metadata]
-module = "audioread"
-author = "Adrian Sampson"
-author-email = "[email protected]"
-home-page = "https://github.com/beetbox/audioread"
-description-file = "README.rst"
+[project]
+name = "audioread"
+authors = [
+    {name = "Adrian Sampson", email = "[email protected]"}
+]
+readme = "README.rst"
 requires-python = ">=3.6"
+dynamic = ["version", "description"]
+urls.Home = "https://github.com/beetbox/audioread"
 classifiers = [
     'Topic :: Multimedia :: Sound/Audio :: Conversion',
     'Intended Audience :: Developers',
@@ -20,7 +22,7 @@ classifiers = [
     'Programming Language :: Python :: 3.10',
 ]
 
-[tool.flit.metadata.requires-extra]
+[project.optional-dependencies]
 test = [
     "tox"
 ]