Bump @openzeppelin/gsn-helpers from 0.2.1 to 0.2.3 (#2052)

Bumps [@openzeppelin/gsn-helpers](https://github.com/OpenZeppelin/openzeppelin-gsn-helpers) from 0.2.1 to 0.2.3.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-gsn-helpers/releases)
- [Commits](https://github.com/OpenZeppelin/openzeppelin-gsn-helpers/compare/v0.2.1...v0.2.3)

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

package-lock.json

@@ -1172,9 +1172,9 @@
       }
     },
     "@openzeppelin/gsn-helpers": {
-      "version": "0.2.1",
-      "resolved": "https://registry.npmjs.org/@openzeppelin/gsn-helpers/-/gsn-helpers-0.2.1.tgz",
-      "integrity": "sha512-EJra2VRQENhze5nHY1iBvPKHMuAmQU0i94EMbJBxiVCtmMzvrESb8r/nL2A6hkyoU/se/VQ4w9KVT28gv02EtQ==",
+      "version": "0.2.3",
+      "resolved": "https://registry.npmjs.org/@openzeppelin/gsn-helpers/-/gsn-helpers-0.2.3.tgz",
+      "integrity": "sha512-NRPFy6rbMfQWgvHW6jlJ0zg5L3wHrCZ9wKO2CmjszUZBwR3K1n8OfKNAXWEYiUArz0c7tP3qZuI7ifGb6dZvJg==",
       "dev": true,
       "requires": {
         "axios": "^0.19.0",

package.json

@@ -45,7 +45,7 @@
   "homepage": "https://github.com/OpenZeppelin/openzeppelin-contracts",
   "devDependencies": {
     "@openzeppelin/cli": "^2.5.3",
-    "@openzeppelin/gsn-helpers": "^0.2.1",
+    "@openzeppelin/gsn-helpers": "^0.2.3",
     "@openzeppelin/gsn-provider": "^0.1.9",
     "@openzeppelin/test-environment": "^0.1.1",
     "@openzeppelin/test-helpers": "^0.5.4",