message: chore(deps): update acorn with `npm audit fix`
diff: "dev": true
  },
  "acorn": {
  - "version": "6.2.1",
  - "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.2.1.tgz",
  - "integrity": "sha512-JD0xT5FCRDNyjDda3Lrg/IxFscp9q4tiYtxE1/nOzlKCk7hIRuYjhq1kCNkbPjMRMZuFq20HNQn1I9k8Oj0E+Q==",
  + "version": "6.4.1",
  + "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
  + "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
  "dev": true
  },
  "acorn-dynamic-import": {
  