Bump zope-interface from 6.4.post2 to 7.0.3 (#576)

Bumps [zope-interface](https://github.com/zopefoundation/zope.interface) from 6.4.post2 to 7.0.3.
- [Changelog](https://github.com/zopefoundation/zope.interface/blob/master/CHANGES.rst)
- [Commits](zopefoundation/zope.interface@6.4.post2...7.0.3)

---
updated-dependencies:
- dependency-name: zope-interface
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

requirements.txt

@@ -62,7 +62,7 @@ whitenoise==6.7.0
     # via screamshotter (setup.py)
 zope-event==5.0
     # via gevent
-zope-interface==6.4.post2
+zope-interface==7.0.3
     # via gevent
 
 # The following packages are considered to be unsafe in a requirements file: