Merge pull request #609 from PythonicNinja/feature/fix-tomli-dependency

fix tomli dependency,

Author: RonnyPfannschmidt

setup.cfg

@@ -28,6 +28,7 @@ classifiers =
 packages = find:
 install_requires =
     setuptools>=45
+    tomli~=1.0
 python_requires = >=3.6
 package_dir =
     =src
@@ -66,7 +67,3 @@ 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
-
-[options.extras_require]
-toml =
-    tomli~=1.0.0