[test] Pin trio to v0.21 in the pytest-min test environment to avoid unhandled deprecation warnings.

seifertm · seifertm · commit d8b005b574bc · 2023-11-08T08:16:37.000Z
Signed-off-by: Michael Seifert &lt;m.seifert@digitalernachschub.de&gt;
diff --git a/dependencies/pytest-min/constraints.txt b/dependencies/pytest-min/constraints.txt
@@ -18,5 +18,6 @@ pytest==7.0.0
 requests==2.28.1
 sortedcontainers==2.4.0
 tomli==2.0.1
+trio==0.21.0
 urllib3==1.26.12
 xmlschema==2.1.1
