chore(deps-dev): bump flow-bin from 0.90.0 to 0.91.0

Bumps [flow-bin](https://github.com/flowtype/flow-bin) from 0.90.0 to 0.91.0.
- [Release notes](https://github.com/flowtype/flow-bin/releases)
- [Commits](https://github.com/flowtype/flow-bin/compare/v0.90.0...v0.91.0)

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

web3.js/package-lock.json

@@ -5486,9 +5486,9 @@
       }
     },
     "flow-bin": {
-      "version": "0.90.0",
-      "resolved": "https://registry.npmjs.org/flow-bin/-/flow-bin-0.90.0.tgz",
-      "integrity": "sha512-/syDchjhLLL7nELK1ggyWJifGXuMCTz74kvkjR1t9DcmasMrilLl9qAAotsACcNb98etEEJpsCrvP7WL64kadw==",
+      "version": "0.91.0",
+      "resolved": "https://registry.npmjs.org/flow-bin/-/flow-bin-0.91.0.tgz",
+      "integrity": "sha512-j+L+xNiUYnZZ27MjVI0y2c9474ZHOvdSQq0Tjwh56mEA7tfxYqp5Dcb6aZSwvs3tGMTjCrZow9aUlZf3OoRyDQ==",
       "dev": true
     },
     "flow-typed": {

web3.js/package.json

@@ -102,7 +102,7 @@
     "eslint-plugin-import": "2.14.0",
     "eslint-plugin-jest": "22.1.3",
     "eslint-plugin-prettier": "^3.0.0",
-    "flow-bin": "0.90.0",
+    "flow-bin": "0.91.0",
     "flow-typed": "2.5.1",
     "fs-file-tree": "1.0.7",
     "jest": "23.6.0",