[Security] Bump acorn from 6.4.0 to 6.4.1 (#2270)

Bumps [acorn](https://github.com/acornjs/acorn) from 6.4.0 to 6.4.1. **This update includes security fixes.**
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.4.0...6.4.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

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

package-lock.json

@@ -4429,8 +4429,7 @@
     "acorn": {
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.0.tgz",
-      "integrity": "sha512-kL5CuoXA/dgxlBbVrflsflzQ3PAas7RYZB52NOm/6839iVYJgKMJ3cQJD+t2i5+qFa8h3MDpEOJiS64E8JLnSQ==",
-      "dev": true
+      "integrity": "sha512-kL5CuoXA/dgxlBbVrflsflzQ3PAas7RYZB52NOm/6839iVYJgKMJ3cQJD+t2i5+qFa8h3MDpEOJiS64E8JLnSQ=="
     },
     "acorn-jsx": {
       "version": "5.1.0",
@@ -8894,11 +8893,6 @@
             "negotiator": "0.6.2"
           }
         },
-        "acorn": {
-          "version": "7.1.0",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.0.tgz",
-          "integrity": "sha512-kL5CuoXA/dgxlBbVrflsflzQ3PAas7RYZB52NOm/6839iVYJgKMJ3cQJD+t2i5+qFa8h3MDpEOJiS64E8JLnSQ=="
-        },
         "acorn-jsx": {
           "version": "5.1.0",
           "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.1.0.tgz",
@@ -21713,7 +21707,6 @@
             "@webassemblyjs/helper-module-context": "1.8.5",
             "@webassemblyjs/wasm-edit": "1.8.5",
             "@webassemblyjs/wasm-parser": "1.8.5",
-            "acorn": "^6.2.1",
             "ajv": "^6.10.2",
             "ajv-keywords": "^3.4.1",
             "chrome-trace-event": "^1.0.2",
@@ -21734,11 +21727,6 @@
             "webpack-sources": "^1.4.1"
           },
           "dependencies": {
-            "acorn": {
-              "version": "6.4.0",
-              "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.0.tgz",
-              "integrity": "sha512-gac8OEcQ2Li1dxIEWGZzsp2BitJxwkwcOm0zHAJLcPJaVvm58FRnk6RkuLRpU1EujipU2ZFODv2P9DLMfnV8mw=="
-            },
             "cacache": {
               "version": "12.0.3",
               "resolved": "https://registry.npmjs.org/cacache/-/cacache-12.0.3.tgz",