Add @typescript-eslint/non-nullable-type-assertion-style rule

https://github.com/typescript-eslint/typescript-eslint/blob/master/packages/eslint-plugin/docs/rules/non-nullable-type-assertion-style.md

Author: sindresorhus

index.js

@@ -434,6 +434,7 @@ module.exports = {
 		'no-useless-constructor': 'off',
 		'@typescript-eslint/no-useless-constructor': 'error',
 		'@typescript-eslint/no-var-requires': 'error',
+		'@typescript-eslint/non-nullable-type-assertion-style': 'error',
 		'@typescript-eslint/prefer-as-const': 'error',
 		'@typescript-eslint/prefer-for-of': 'error',
 		'@typescript-eslint/prefer-function-type': 'error',

package.json

@@ -44,15 +44,15 @@
 		"simple"
 	],
 	"devDependencies": {
-		"@typescript-eslint/eslint-plugin": "^4.7.0",
-		"@typescript-eslint/parser": "^4.7.0",
+		"@typescript-eslint/eslint-plugin": "^4.10.0",
+		"@typescript-eslint/parser": "^4.10.0",
 		"ava": "^2.4.0",
 		"eslint": "^7.8.1",
 		"temp-write": "^4.0.0",
-		"typescript": "^4.0.2"
+		"typescript": "^4.1.3"
 	},
 	"peerDependencies": {
-		"@typescript-eslint/eslint-plugin": ">=4.7.0",
+		"@typescript-eslint/eslint-plugin": ">=4.10.0",
 		"eslint": ">=7.8.0",
 		"typescript": ">=3.6.0"
 	}