fix: fix dependency issue

Author: haoqunjiang

packages/@vue/cli-ui/package.json

@@ -16,11 +16,11 @@
     "apollo:start:test": "cross-env VUE_CLI_DEBUG=true VUE_CLI_UI_TEST=true VUE_APP_GRAPHQL_PORT=4040 VUE_APP_CLI_UI_URL=ws://localhost:4040/graphql VUE_CLI_IPC=vue-cli-test vue-cli-service apollo:dev --mode production",
     "prepublishOnly": "yarn run lint --no-fix && yarn run build",
     "test:e2e": "yarn run test:clear && start-server-and-test apollo:start:test http://localhost:4040/.well-known/apollo/server-health test:e2e:dev",
-    "test:run": "yarn run test:clear && start-server-and-test apollo:start:test http://localhost:4040/.well-known/apollo/server-health test:e2e:run",
+    "test:start": "yarn run test:clear && start-server-and-test apollo:start:test http://localhost:4040/.well-known/apollo/server-health test:e2e:start",
     "test:e2e:dev": "cross-env VUE_APP_CLI_UI_URL=ws://localhost:4040/graphql vue-cli-service test:e2e --mode development",
-    "test:e2e:run": "vue-cli-service test:e2e --mode production --headless --url=http://localhost:4040",
+    "test:e2e:start": "vue-cli-service test:e2e --mode production --headless --url=http://localhost:4040",
     "test:clear": "rimraf ../../test/cli-ui-test && rimraf ./live-test",
-    "test": "yarn run build && cd ../cli-ui-addon-webpack && yarn run build && cd ../cli-ui-addon-widgets && yarn run build && cd ../cli-ui && yarn run test:run"
+    "test": "yarn run build && cd ../cli-ui-addon-webpack && yarn run build && cd ../cli-ui-addon-widgets && yarn run build && cd ../cli-ui && yarn run test:start"
   },
   "files": [
     "apollo-server",
@@ -85,6 +85,7 @@
     "start-server-and-test": "^1.9.1",
     "stylus": "^0.54.5",
     "stylus-loader": "^3.0.1",
+    "subscriptions-transport-ws": "^0.9.6",
     "vue": "^2.6.10",
     "vue-apollo": "^3.0.0-beta.29",
     "vue-color": "^2.4.6",