SEBA-420 Enable linting test in Makefile; update requirements

Change-Id: Iccd51cf0974d4a8ecefecef2c7d1f907e1267e5a
diff --git a/Makefile b/Makefile
index 872f8d0..7823757 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,7 @@
 	./scripts/setup_venv.sh
 
 # tests
-test: lib-test xos-test migration-test
+test: lib-test xos-test migration-test core-xproto-test
 
 lib-test:
 	for lib in $(XOS_LIBRARIES); do pushd $$lib; tox; popd; done