Use pip 19.3.1+ for vendoring task
@@ -53,6 +53,9 @@ commands_pre =
deps =
invoke
requests
+ # Required, otherwise we interpret --no-binary :all: as
+ # "do not build wheels", which fails for PEP 517 requirements
+ pip>=19.3.1
whitelist_externals = git
commands =
# Check that the vendoring is up-to-date
