deps: bump pytest-servers to >=0.3.0 (#48)

Author: efiop

setup.cfg

@@ -41,7 +41,7 @@ tests =
     pytest-xdist==2.4.0
     pytest-mock==3.6.1
     pytest-lazy-fixture==0.6.3
-    pytest-servers[gcs]==0.2.6
+    pytest-servers[gcs]>=0.3.0
     flaky==3.7.0
     mock==4.0.3
     wget==3.2