Bump css-loader from 3.4.2 to 3.6.0 in /token/js (#101)

Bumps [css-loader](https://github.com/webpack-contrib/css-loader) from 3.4.2 to 3.6.0.
- [Release notes](https://github.com/webpack-contrib/css-loader/releases)
- [Changelog](https://github.com/webpack-contrib/css-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/css-loader@v3.4.2...v3.6.0)

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

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

Author: dependabot[bot]

token/js/package-lock.json

@@ -47,7 +47,7 @@
     "bn.js": "^5.0.0",
     "body-parser": "^1.18.3",
     "buffer-layout": "^1.2.0",
-    "css-loader": "^3.1.0",
+    "css-loader": "^3.6.0",
     "dotenv": "8.2.0",
     "eslint": "^6.1.0",
     "eslint-loader": "^3.0.0",