Bump @babel/node from 7.12.1 to 7.12.6 in /token-swap/js (#804)

Bumps [@babel/node](https://github.com/babel/babel/tree/HEAD/packages/babel-node) from 7.12.1 to 7.12.6.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.12.6/packages/babel-node)

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token-swap/js/package-lock.json

@@ -746,9 +746,9 @@
       }
     },
     "@babel/node": {
-      "version": "7.12.1",
-      "resolved": "https://registry.npmjs.org/@babel/node/-/node-7.12.1.tgz",
-      "integrity": "sha512-S4tWOqo3V3ZuJjJNuheSMFIlDaQd6kbvqnQll+tdJTirksTdFHrauQf3d/xW4rgAM+mHJpxTZMHVeIXjCiDViw==",
+      "version": "7.12.6",
+      "resolved": "https://registry.npmjs.org/@babel/node/-/node-7.12.6.tgz",
+      "integrity": "sha512-A1TpW2X05ZkI5+WV7Aa24QX4LyGwrGUQPflG1CyBdr84jUuH0mhkE2BQWSQAlfRnp4bMLjeveMJIhS20JaOfVQ==",
       "dev": true,
       "requires": {
         "@babel/register": "^7.12.1",