tests: bump pytest-localserver to latest (#2267)

Author: xrmx

tests/requirements/reqs-base.txt

@@ -9,7 +9,7 @@ coverage==7.3.1 ; python_version > '3.7'
 pytest-cov==4.0.0 ; python_version < '3.8'
 pytest-cov==4.1.0 ; python_version > '3.7'
 jinja2==3.1.5 ; python_version == '3.7'
-pytest-localserver==0.5.0
+pytest-localserver==0.9.0
 pytest-mock==3.6.1 ; python_version == '3.6'
 pytest-mock==3.10.0 ; python_version > '3.6'
 pytest-benchmark==3.4.1 ; python_version == '3.6'