chore(deps-dev): bump acorn from 7.2.0 to 7.3.1

Bumps [acorn](https://github.com/acornjs/acorn) from 7.2.0 to 7.3.1.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/7.2.0...7.3.1)

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

web3.js/package-lock.json

@@ -6445,9 +6445,9 @@
       }
     },
     "acorn": {
-      "version": "7.2.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.2.0.tgz",
-      "integrity": "sha512-apwXVmYVpQ34m/i71vrApRrRKCWQnZZF1+npOD0WV5xZFfwWOmKGQ2RWlfdy9vWITsenisM8M0Qeq8agcFHNiQ==",
+      "version": "7.3.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.3.1.tgz",
+      "integrity": "sha512-tLc0wSnatxAQHVHUapaHdz72pi9KUyHjq5KyHjGg9Y8Ifdc79pTh2XvI6I1/chZbnM7QtNKzh66ooDogPZSleA==",
       "dev": true
     },
     "acorn-globals": {