chore(deps): update dependency source-map-support to v0.5.21

| datasource | package            | from   | to     |
| ---------- | ------------------ | ------ | ------ |
| npm        | source-map-support | 0.5.20 | 0.5.21 |

Author: renovate-bot

package.json

@@ -32,7 +32,7 @@
     "html-webpack-plugin": "3.2.0",
     "istanbul-lib-coverage": "2.0.5",
     "nyc": "14.1.1",
-    "source-map-support": "0.5.20",
+    "source-map-support": "0.5.21",
     "styled-components": "4.4.1",
     "ts-node": "8.10.2",
     "typescript": "3.9.10",