Bump prettier from 2.0.5 to 2.1.0 in /token-swap/js (#313)

Bumps [prettier](https://github.com/prettier/prettier) from 2.0.5 to 2.1.0.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prettier/prettier/compare/2.0.5...2.1.0)

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

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

token-swap/js/package-lock.json

@@ -5032,9 +5032,9 @@
       "dev": true
     },
     "prettier": {
-      "version": "2.0.5",
-      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.0.5.tgz",
-      "integrity": "sha512-7PtVymN48hGcO4fGjybyBSIWDsLU4H4XlvOHfq91pz9kkGlonzwTfYkaIEwiRg/dAJF9YlbsduBAgtYLi+8cFg==",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-2.1.0.tgz",
+      "integrity": "sha512-lz28cCbA1cDFHVuY8vvj6QuqOwIpyIfPUYkSl8AZ/vxH8qBXMMjE2knfLHCrZCmUsK/H1bg1P0tOo0dJkTJHvw==",
       "dev": true
     },
     "process-nextick-args": {

token-swap/js/package.json

@@ -50,7 +50,7 @@
     "flow-bin": "0.131.0",
     "flow-typed": "^3.2.0",
     "mz": "^2.7.0",
-    "prettier": "^2.0.5",
+    "prettier": "^2.1.0",
     "semver": "^7.0.0",
     "watch": "^1.0.2"
   },