Bump acorn from 6.0.5 to 6.0.6

Bumps [acorn](https://github.com/acornjs/acorn) from 6.0.5 to 6.0.6.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.0.5...6.0.6)

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

package-lock.json

@@ -1040,9 +1040,9 @@
       "dev": true
     },
     "acorn": {
-      "version": "6.0.5",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.5.tgz",
-      "integrity": "sha512-i33Zgp3XWtmZBMNvCr4azvOFeWVw1Rk6p3hfi3LUDvIFraOMywb1kAtrbi+med14m4Xfpqm3zRZMT+c0FNE7kg==",
+      "version": "6.0.6",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.6.tgz",
+      "integrity": "sha512-5M3G/A4uBSMIlfJ+h9W125vJvPFH/zirISsW5qfxF5YzEvXJCtolLoQvM5yZft0DvMcUrPGKPOlgEu55I6iUtA==",
       "dev": true
     },
     "acorn-dynamic-import": {

package.json

@@ -57,7 +57,7 @@
 		"@babel/plugin-syntax-dynamic-import": "^7.2.0",
 		"@babel/preset-env": "^7.3.1",
 		"@vue/test-utils": "^1.0.0-beta.28",
-		"acorn": "^6.0.5",
+		"acorn": "^6.0.6",
 		"babel-eslint": "^10.0.1",
 		"babel-jest": "^24.0.0",
 		"babel-loader": "^8.0.5",