test: fix

Author: alexander-akait

test/fixtures/provide-plugin-default/foo.js

@@ -6,4 +6,4 @@ const WebsocketClient =
 
 window.expectedClient = WebsocketClient;
 // eslint-disable-next-line camelcase, no-undef
-window.injectedClient = __webpack_dev_server_client__;
+window.injectedClient = __webpack_dev_server_client__.default;

test/fixtures/provide-plugin-sockjs-config/foo.js

@@ -5,4 +5,4 @@ const SockJSClient = require("../../../client/clients/SockJSClient").default;
 
 window.expectedClient = SockJSClient;
 // eslint-disable-next-line camelcase, no-undef
-window.injectedClient = __webpack_dev_server_client__;
+window.injectedClient = __webpack_dev_server_client__.default;

test/fixtures/provide-plugin-ws-config/foo.js

@@ -6,4 +6,4 @@ const WebsocketClient =
 
 window.expectedClient = WebsocketClient;
 // eslint-disable-next-line camelcase, no-undef
-window.injectedClient = __webpack_dev_server_client__;
+window.injectedClient = __webpack_dev_server_client__.default;