Bump acorn from 6.0.0 to 6.4.1 (#10570)

Bumps [acorn](https://github.com/acornjs/acorn) from 6.0.0 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](acornjs/acorn@6.0.0...6.4.1)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -3030,7 +3030,7 @@
         "@types/winreg": "^1.2.30",
         "@types/ws": "^6.0.1",
         "@types/xml2js": "^0.4.2",
-        "acorn": "^6.0.0",
+        "acorn": "^6.4.1",
         "ansi-to-html": "^0.6.7",
         "awesome-typescript-loader": "^5.2.1",
         "babel-loader": "^8.0.3",