Update eslint configuration

.eslintrc.json

@@ -1,3 +1,6 @@
+// Implements WordPress JS Coding Standards
+// https://developer.wordpress.org/coding-standards/wordpress-coding-standards/javascript/
+
 {
 	"root": true,
 	"parser": "@typescript-eslint/parser",
@@ -10,7 +13,8 @@
 	"extends": [
 		"plugin:react/recommended",
 		"plugin:jsx-a11y/recommended",
-		"plugin:jest/recommended"
+		"plugin:jest/recommended",
+		"plugin:@typescript-eslint/recommended"
 	],
 	"env": {
 		"browser": false,
@@ -142,13 +146,15 @@
 				"message": "Translate function arguments must be string literals."
 			}
 		],
-		"no-shadow": "error",
+		"no-shadow": "off",
+  	"@typescript-eslint/no-shadow": ["error"],
 		"no-undef": "error",
 		"no-undef-init": "error",
 		"no-unreachable": "error",
 		"no-unsafe-negation": "error",
 		"no-unused-expressions": "error",
-		"no-unused-vars": "error",
+		"no-unused-vars": "off",
+  	"@typescript-eslint/no-unused-vars": ["error"],
 		"no-useless-computed-key": "error",
 		"no-useless-constructor": "error",
 		"no-useless-return": "error",

package.json

@@ -4,6 +4,7 @@
 	"private": true,
 	"main": "src/blocks.ts",
 	"scripts": {
+		"lint:js": "wp-scripts lint-js 'src/**/*{.js,.jsx,.ts,.tsx}'",
 		"build:js": "webpack --mode=production",
 		"build:sass": "sass src/styles:dist",
 		"build": "npm run build:js && npm run build:sass",