Issue #700: pin down urllib3 to workaround httpretty incompatibility issue

Author: soxofaan

setup.py

@@ -22,6 +22,7 @@
     "mock",
     "requests-mock>=1.8.0",
     "httpretty>=1.1.4",
+    "urllib3<2.3.0",  # httpretty doesn't work properly with urllib3>2.3.0. See https://github.com/Open-EO/openeo-python-client/issues/700
     "netCDF4>=1.7.0",
     "matplotlib",  # TODO: eliminate matplotlib as test dependency
     "geopandas",