Use --use-deprecated=legacy-resolver

Let’s see how test results change

tox.ini

@@ -27,6 +27,10 @@ passenv =
     GCS_PROJECT_ID
 #allow tox virtualenv to upgrade pip/wheel/setuptools
 download = true
+# TODO: Remove the custom install_command below
+# Temporary workaround to filter out errors caused by the insanely long time
+# that it takes for the new resolver to install dependencies.
+install_command=python -m pip install --use-deprecated=legacy-resolver {opts} {packages}
 commands =
     py.test --cov=scrapy --cov-report=xml --cov-report= {posargs:--durations=10 docs scrapy tests}