Bump @babel/core from 7.11.1 to 7.11.4 in /token-swap/js (#337)

Bumps [@babel/core](https://github.com/babel/babel/tree/HEAD/packages/babel-core) from 7.11.1 to 7.11.4.
- [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/v7.11.4/packages/babel-core)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

token-swap/js/package-lock.json

@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "@babel/cli": "^7.10.5",
-    "@babel/core": "^7.11.1",
+    "@babel/core": "^7.11.4",
     "@babel/node": "^7.10.5",
     "@babel/plugin-proposal-class-properties": "^7.10.4",
     "@babel/plugin-transform-runtime": "^7.11.0",