Bump zope-interface from 5.0.2 to 5.1.0

Bumps [zope-interface](https://github.com/zopefoundation/zope.interface) from 5.0.2 to 5.1.0.
- [Release notes](https://github.com/zopefoundation/zope.interface/releases)
- [Changelog](https://github.com/zopefoundation/zope.interface/blob/master/CHANGES.rst)
- [Commits](zopefoundation/zope.interface@5.0.2...5.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

requirements.txt

@@ -39,4 +39,4 @@ venusian==3.0.0
 waitress==1.4.3
 WebOb==1.8.6
 zope.deprecation==4.4.0
-zope.interface==5.0.2
+zope.interface==5.1.0