Add @typescript-eslint/no-dupe-class-members rule

https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/no-dupe-class-members.md

Author: sindresorhus

index.js

@@ -211,6 +211,8 @@ module.exports = {
 		],
 		'no-array-constructor': 'off',
 		'@typescript-eslint/no-array-constructor': 'error',
+		'no-dupe-class-members': 'off',
+		'@typescript-eslint/no-dupe-class-members': 'error',
 		'@typescript-eslint/no-dynamic-delete': 'error',
 		'no-empty-function': 'off',
 		'@typescript-eslint/no-empty-function': 'error',

package.json

@@ -43,15 +43,15 @@
 		"simple"
 	],
 	"devDependencies": {
-		"@typescript-eslint/eslint-plugin": "^2.18.0",
-		"@typescript-eslint/parser": "^2.18.0",
+		"@typescript-eslint/eslint-plugin": "^2.19.0",
+		"@typescript-eslint/parser": "^2.19.0",
 		"ava": "^2.4.0",
 		"eslint": "^6.8.0",
 		"temp-write": "^4.0.0",
 		"typescript": "^3.7.5"
 	},
 	"peerDependencies": {
-		"@typescript-eslint/eslint-plugin": ">=2.18.0",
+		"@typescript-eslint/eslint-plugin": ">=2.19.0",
 		"eslint": ">=6.6.0",
 		"typescript": ">=3.5.3"
 	}