chore(deps-dev): bump source-map-support from 0.5.19 to 0.5.21 (#7681)

Author: dependabot[bot]

package-lock.json

@@ -157,7 +157,7 @@
     "sass": "^1.35.1",
     "sass-loader": "^9.0.3",
     "sinon": "=12.0.1",
-    "source-map-support": "^0.5.19",
+    "source-map-support": "^0.5.21",
     "start-server-and-test": "=1.14.0",
     "tachyons-sass": "^4.9.5",
     "terser-webpack-plugin": "^4.2.3",