Fix travis issue

containers/test.sh

@@ -6,7 +6,7 @@ export COMPOSE_PROJECT_NAME=lesspass
 docker-compose build
 docker-compose up -d
 date -u
-docker exec -it lesspass_backend_1 sh -c 'python3 wait_db.py'
+docker exec -it lesspass_backend_1 sh -c '/opt/app/venv/bin/python wait_db.py'
 date -u
-docker exec -it lesspass_backend_1 sh -c 'python3 manage.py test'
+docker exec -it lesspass_backend_1 sh -c '/opt/app/venv/bin/python manage.py test'
 docker-compose down

package.json

@@ -9,7 +9,9 @@
   "scripts": {
     "test": "yarn workspaces run test"
   },
-  "workspaces": "packages/*",
+  "workspaces": [
+    "packages/*"
+  ],
   "devDependencies": {
     "@babel/core": "7.2.2",
     "babel-core": "7.0.0-bridge.0",