This fails with setuptools-67

Bug: https://bugs.gentoo.org/892569
See also: https://github.com/dropbox/dropbox-sdk-python/issues/458

--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,7 @@
 install_reqs = [
     'requests >= 2.16.2',
     'six >= 1.12.0',
-    'stone >= 2.*',
+    'stone >= 2.0',
 ]
 
 setup_requires = [
--- a/test/requirements.txt
+++ b/test/requirements.txt
@@ -2,4 +2,4 @@
 mock
 pytest-mock
 coverage
-stone>=2.*
\ No newline at end of file
+stone>=2.0