[meta] use string labels

String labels like `"off","warn","error"` are easier to read/understand than `0,1,2`.

.eslintrc

@@ -4,22 +4,22 @@
 	"extends": "@ljharb",
 
 	"rules": {
-		"eqeqeq": [2, "allow-null"],
-		"func-name-matching": [2, "always"],
-		"max-depth": [1, 4],
-		"no-magic-numbers": [2, {
+		"eqeqeq": ["error", "allow-null"],
+		"func-name-matching": ["error", "always"],
+		"max-depth": ["warn", 4],
+		"no-magic-numbers": ["error", {
 			"ignore": [0, 1, 2],
 		}],
-		"no-restricted-syntax": [2, "BreakStatement", "ContinueStatement", "DebuggerStatement", "LabeledStatement", "WithStatement"],
-		"sort-keys": [0],
+		"no-restricted-syntax": ["error", "BreakStatement", "DebuggerStatement", "LabeledStatement", "WithStatement"],
+		"sort-keys": "off",
 	},
 
 	"overrides": [
 		{
 			"files": "test/**",
 			"rules": {
-				"max-lines-per-function": 0,
-				"no-magic-numbers": 0,
+				"max-lines-per-function": "off",
+				"no-magic-numbers": "off",
 			},
 		},
 	],