Bump acorn from 6.2.0 to 6.4.1 (#1911)

Bumps [acorn](https://github.com/acornjs/acorn) from 6.2.0 to 6.4.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.2.0...6.4.1)
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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package-lock.json

@@ -5003,9 +5003,9 @@
 			}
 		},
 		"acorn": {
-			"version": "6.2.0",
-			"resolved": "https://registry.npmjs.org/acorn/-/acorn-6.2.0.tgz",
-			"integrity": "sha512-8oe72N3WPMjA+2zVG71Ia0nXZ8DpQH+QyyHO+p06jT8eg8FGG3FbcUIi8KziHlAfheJQZeoqbvq1mQSQHXKYLw==",
+			"version": "7.1.1",
+			"resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+			"integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
 			"dev": true
 		},
 		"acorn-jsx": {
@@ -9483,14 +9483,6 @@
 				"acorn": "^7.0.0",
 				"acorn-jsx": "^5.0.2",
 				"eslint-visitor-keys": "^1.1.0"
-			},
-			"dependencies": {
-				"acorn": {
-					"version": "7.0.0",
-					"resolved": "https://registry.npmjs.org/acorn/-/acorn-7.0.0.tgz",
-					"integrity": "sha512-PaF/MduxijYYt7unVGRuds1vBC9bFxbNf+VWqhOClfdgy7RlVkQqt610ig1/yxTgsDIfW1cWDel5EBbOy3jdtQ==",
-					"dev": true
-				}
 			}
 		},
 		"esprima": {
@@ -22727,6 +22719,14 @@
 				"terser-webpack-plugin": "^1.1.0",
 				"watchpack": "^1.5.0",
 				"webpack-sources": "^1.3.0"
+			},
+			"dependencies": {
+				"acorn": {
+					"version": "6.4.1",
+					"resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+					"integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
+					"dev": true
+				}
 			}
 		},
 		"webpack-cli": {