dash-table visual tests: only one width

Author: alexcjohnson

components/dash-table/package.json

@@ -34,7 +34,7 @@
     "lint": "run-s private::lint.*",
     "test.server": "pytest --nopercyfinalize tests/selenium",
     "test.unit": "run-s private::test.python private::test.unit",
-    "test.visual": "build-storybook && percy-storybook",
+    "test.visual": "build-storybook && percy-storybook --widths=1280",
     "test.visual-local": "build-storybook"
   },
   "author": "Chris Parmer <[email protected]>",