Backed out changeset 0e5de9eade9c (bug 1617642) for causing docker image build bustages CLOSED TREE

taskcluster/docker/funsize-update-generator/Pipfile

@@ -1,5 +1,5 @@
 [requires]
-python_version = '3.8'
+python_version = '3.6'
 
 [packages]
 aiohttp = "*"

taskcluster/docker/pipfile-updates/scripts/update_pipfiles.sh

@@ -116,6 +116,9 @@ fi
 clone_repo
 
 ${PIP} install pipenv
+# Bug 1497162
+# Can be removed when https://github.com/pypa/pipenv/issues/2924 is released
+${PIP} install --user pip==18.0
 
 update_pipfile "${PIPFILE_DIRECTORY}"
 echo "INFO: diffing old/new Pipfile.lock into ${DIFF_ARTIFACT}"