feat: upgrade eslint-plugin-promise from 4.3.1 to 6.1.1

Snyk has created this PR to upgrade eslint-plugin-promise from 4.3.1 to 6.1.1.

See this package in npm:
https://www.npmjs.com/package/eslint-plugin-promise

See this project in Snyk:
https://app.snyk.io/org/woodpile37/project/fd850637-423a-4efe-a39b-914ded24da34?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -61,7 +61,7 @@
     "eslint-plugin-import": "^2.20.0",
     "eslint-plugin-mocha-no-only": "^1.1.0",
     "eslint-plugin-node": "^10.0.0",
-    "eslint-plugin-promise": "^4.2.1",
+    "eslint-plugin-promise": "^6.1.1",
     "eslint-plugin-standard": "^4.0.1",
     "eth-sig-util": "^3.0.0",
     "ethereumjs-util": "^7.0.7",