Bump acorn from 5.7.4 to 8.0.4 (#269)

Bumps [acorn](https://github.com/acornjs/acorn) from 5.7.4 to 8.0.4.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](acornjs/acorn@5.7.4...8.0.4)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -69,7 +69,7 @@
   },
   "dependencies": {
     "@2fd/command": "^1.1.2",
-    "acorn": "^5.7.4",
+    "acorn": "^8.0.4",
     "bluebird": "^3.5.5",
     "deepmerge": "^4.2.2",
     "fs-extra": "^0.30.0",