lock jasmine version to avoid 2.5 breaking ssr tests

package.json

@@ -65,8 +65,8 @@
     "flow-bin": "^0.31.1",
     "flow-remove-types": "github:yyx990803/flow-remove-types",
     "http-server": "^0.9.0",
-    "jasmine": "^2.4.1",
-    "jasmine-core": "^2.4.1",
+    "jasmine": "2.4.x",
+    "jasmine-core": "2.4.x",
     "karma": "^1.1.0",
     "karma-chrome-launcher": "^2.0.0",
     "karma-coverage": "^1.0.0",