chore: add ts-eslint

.eslintrc

@@ -69,6 +69,22 @@
 			"rules": {
 				"no-console": "off"
 			}
+		},
+		{
+			"files": ["**/*.ts"],
+			"extends": ["plugin:@typescript-eslint/recommended"],
+			"parser": "@typescript-eslint/parser",
+			"plugins": ["@typescript-eslint"],
+			"rules": {
+				"node/no-unsupported-features/es-syntax": "off"
+			}
+		},
+		{
+			"files": ["**/*.d.ts"],
+			"rules": {
+				"@typescript-eslint/no-explicit-any": "off",
+				"@typescript-eslint/no-unused-vars": "off"
+			}
 		}
 	]
 }

index.d.ts

@@ -70,7 +70,7 @@ export class Registry<RegistryContentType = PrometheusContentType> {
 	 * @param labels of name/value pairs:
 	 * { defaultLabel: "value", anotherLabel: "value 2" }
 	 */
-	setDefaultLabels(labels: Object): void;
+	setDefaultLabels(labels: object): void;
 
 	/**
 	 * Get a string representation of a single metric by name
@@ -197,7 +197,7 @@ interface MetricObject {
 	help: string;
 	type: MetricType;
 	aggregator: Aggregator;
-	collect: CollectFunction<any>;
+	collect: CollectFunction<unknown>;
 }
 
 interface MetricObjectWithValues<T extends MetricValue<string>>
@@ -770,7 +770,7 @@ export interface DefaultMetricsCollectorConfiguration<
 	prefix?: string;
 	gcDurationBuckets?: number[];
 	eventLoopMonitoringPrecision?: number;
-	labels?: Object;
+	labels?: object;
 }
 
 export const collectDefaultMetrics: {

package.json

@@ -34,6 +34,8 @@
 	"homepage": "https://github.com/siimon/prom-client",
 	"devDependencies": {
 		"@clevernature/benchmark-regression": "^1.0.0",
+		"@typescript-eslint/eslint-plugin": "^6.21.0",
+		"@typescript-eslint/parser": "^6.21.0",
 		"eslint": "^8.32.0",
 		"eslint-config-prettier": "^9.1.0",
 		"eslint-plugin-node": "^11.0.0",