Fix starlette requirements (#2051)

* tests: fix ancient starlette requirements

Newer requests dropped support for Pyrhon < 3.8 so keep an old version
for these requirements. Hopefully it'll also be useful as reminder next
time dependabot will bump a release.

* ci: run starlette-0.14 tests before merging

To avoid regressions with dependabot bumps

.ci/.matrix_framework.yml

@@ -45,6 +45,8 @@ FRAMEWORK:
   - aiopg-newest
   - asyncpg-newest
   - tornado-newest
+  # this has a dependency on requests, run it to catch update issues before merging. Drop after baseline > 0.21.0
+  - starlette-0.14
   - starlette-newest
   - pymemcache-newest
   - graphene-2

tests/requirements/reqs-starlette-0.13.txt

@@ -1,4 +1,5 @@
 starlette>=0.13,<0.14
 aiofiles==0.7.0
-requests==2.32.0
+requests==2.32.1; python_version >= '3.8'
+requests==2.31.0; python_version < '3.8'
 -r reqs-base.txt

tests/requirements/reqs-starlette-0.14.txt

@@ -1,4 +1,5 @@
 starlette>=0.14,<0.15
-requests==2.32.0
+requests==2.32.1; python_version >= '3.8'
+requests==2.31.0; python_version < '3.8'
 aiofiles
 -r reqs-base.txt