Use "whey" as the build backend.

Author: domdfcoding

MANIFEST.in

@@ -1,6 +1,6 @@
 [build-system]
-requires = [ "setuptools>=40.6.0", "wheel>=0.34.2",]
-build-backend = "setuptools.build_meta"
+requires = [ "whey",]
+build-backend = "whey"
 
 [project]
 name = "flake8_sphinx_links"
@@ -22,5 +22,18 @@ Homepage = "https://github.com/domdfcoding/flake8-sphinx-links"
 "Source Code" = "https://github.com/domdfcoding/flake8-sphinx-links"
 Documentation = "https://flake8-sphinx-links.readthedocs.io/en/latest"
 
+[tool.whey]
+base-classifiers = [
+    "Development Status :: 4 - Beta",
+    "Framework :: Flake8",
+    "Intended Audience :: Developers",
+    "Topic :: Utilities",
+    "Typing :: Typed",
+]
+python-versions = [ "3.6", "3.7", "3.8", "3.9",]
+python-implementations = [ "CPython", "PyPy",]
+platforms = [ "Windows", "macOS", "Linux",]
+license-key = "MIT"
+
 [project.entry-points."flake8.extension"]
 SXL = "flake8_sphinx_links:Plugin"

pyproject.toml

@@ -10,11 +10,13 @@ username: "domdfcoding"
 license: 'MIT'
 short_desc: "A Flake8 plugin to check docstrings for double backticked strings which should be links to the Python documentation."
 
+python_deploy_version: 3.6
+use_whey: true
+min_coverage: 100
+
 conda_channels:
  - conda-forge
 
-python_deploy_version: 3.6
-
 # Versions to run tests for
 python_versions:
  - '3.6'
@@ -39,8 +41,6 @@ entry_points:
   flake8.extension:
    - SXL=flake8_sphinx_links:Plugin
 
-min_coverage: 100
-
 sphinx_conf_epilogue:
  - nitpicky = True