Bump @rollup/plugin-babel from 5.1.0 to 5.2.0 in /token/js (#272)

Bumps [@rollup/plugin-babel](https://github.com/rollup/plugins) from 5.1.0 to 5.2.0.
- [Release notes](https://github.com/rollup/plugins/releases)
- [Commits](https://github.com/rollup/plugins/compare/babel-v5.1.0...babel-v5.2.0)

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

token/js/package-lock.json

@@ -2160,13 +2160,13 @@
       }
     },
     "@rollup/plugin-babel": {
-      "version": "5.1.0",
-      "resolved": "https://registry.npmjs.org/@rollup/plugin-babel/-/plugin-babel-5.1.0.tgz",
-      "integrity": "sha512-zXBEYmfiLAMvB+ZBa6m/q9hsQYAq1sUFdjuP1F6C2pf6uQcpHwAWQveZgzS63zXdKPUYHD3Dr7BhjCqcr0bbLw==",
+      "version": "5.2.0",
+      "resolved": "https://registry.npmjs.org/@rollup/plugin-babel/-/plugin-babel-5.2.0.tgz",
+      "integrity": "sha512-CPABsajaKjINgBQ3it+yMnfVO3ibsrMBxRzbUOUw2cL1hsZJ7aogU8mgglQm3S2hHJgjnAmxPz0Rq7DVdmHsTw==",
       "dev": true,
       "requires": {
-        "@babel/helper-module-imports": "^7.7.4",
-        "@rollup/pluginutils": "^3.0.8"
+        "@babel/helper-module-imports": "^7.10.4",
+        "@rollup/pluginutils": "^3.1.0"
       }
     },
     "@rollup/plugin-commonjs": {