Bump zope-interface from 4.7.1 to 4.7.2

Bumps [zope-interface](https://github.com/zopefoundation/zope.interface) from 4.7.1 to 4.7.2.
- [Release notes](https://github.com/zopefoundation/zope.interface/releases)
- [Changelog](https://github.com/zopefoundation/zope.interface/blob/master/CHANGES.rst)
- [Commits](zopefoundation/zope.interface@4.7.1...4.7.2)

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

requirements.txt

@@ -44,4 +44,4 @@ venusian==3.0.0
 waitress==1.4.3
 WebOb==1.8.6
 zope.deprecation==4.4.0
-zope.interface==4.7.1
+zope.interface==4.7.2