chore(deps): update dependency supports-color to v7

Author: renovate-bot

package-lock.json

@@ -61,7 +61,7 @@
     "sockjs-client": "1.3.0",
     "spdy": "^4.0.0",
     "strip-ansi": "^3.0.1",
-    "supports-color": "^6.1.0",
+    "supports-color": "^7.0.0",
     "url": "^0.11.0",
     "webpack-dev-middleware": "^3.7.0",
     "webpack-log": "^2.0.0",