Bump rollup from 2.30.0 to 2.31.0 in /token-lending/js (#640)

Bumps [rollup](https://github.com/rollup/rollup) from 2.30.0 to 2.31.0.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.30.0...v2.31.0)

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

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

token-lending/js/package-lock.json

@@ -2231,9 +2231,9 @@
       }
     },
     "rollup": {
-      "version": "2.30.0",
-      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.30.0.tgz",
-      "integrity": "sha512-j4K1hUZfgFM03DUpayd3c7kZW+2wDbI6rj7ssQxpCpL1vsGpaM0vSorxBuePFwQDFq9O2DI6AOQbm174Awsq4w==",
+      "version": "2.31.0",
+      "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.31.0.tgz",
+      "integrity": "sha512-0d8S3XwEZ7aCP910/9SjnelgLvC+ZXziouVolzxPOM1zvKkHioGkWGJIWmlOULlmvB8BZ6S0wrgsT4yMz0eyMg==",
       "dev": true,
       "requires": {
         "fsevents": "~2.1.2"

token-lending/js/package.json

@@ -57,7 +57,7 @@
     "eslint-config-prettier": "^6.12.0",
     "eslint-plugin-prettier": "^3.1.4",
     "prettier": "^2.1.2",
-    "rollup": "^2.30.0",
+    "rollup": "^2.31.0",
     "rollup-plugin-json": "^4.0.0",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-sourcemaps": "^0.6.3",