add a empty toml extra to silence warnings for older dependency versions

RonnyPfannschmidt · RonnyPfannschmidt · commit ccd9e7c14480 · 2021-08-27T16:36:39.000+02:00
diff --git a/setup.cfg b/setup.cfg
@@ -67,3 +67,6 @@ setuptools_scm.version_scheme =
     release-branch-semver = setuptools_scm.version:release_branch_semver_version
     no-guess-dev = setuptools_scm.version:no_guess_dev_version
     calver-by-date = setuptools_scm.version:calver_by_date
+
+[option.extras_require]
+toml = # empty
