Merge pull request #1143 from python-trio/dependabot/pip/zipp-0.5.2

Author: dependabot-preview[bot]

test-requirements.txt

@@ -54,4 +54,4 @@ typed-ast==1.3.1 ; python_version < "3.8" and implementation_name == "cpython"
 wcwidth==0.1.7            # via prompt-toolkit, pytest
 wrapt==1.11.2             # via astroid
 yapf==0.27.0
-zipp==0.5.1               # via importlib-metadata
+zipp==0.5.2               # via importlib-metadata