feat(winston): add TS types (#88)

Based on #82 which added types for Pino.

loggers/winston/index.d.ts

@@ -0,0 +1,30 @@
+import type { Format } from "winston";
+
+interface Config {
+  /**
+   * Whether to convert a logged `err` field to ECS error fields.
+   * Default true.
+   */
+  convertErr?: boolean;
+  /**
+   * Whether to convert logged `req` and `res` HTTP request and response fields
+   * to ECS HTTP, User agent, and URL fields. Default false.
+   */
+  convertReqRes?: boolean;
+  /**
+   * Whether to automatically integrate with
+   * Elastic APM (https://github.com/elastic/apm-agent-nodejs). If a started
+   * APM agent is detected, then log records will include the following
+   * fields:
+   *
+   * - "service.name" - the configured serviceName in the agent
+   * - "event.dataset" - set to "$serviceName.log" for correlation in Kibana
+   * - "trace.id", "transaction.id", and "span.id" - if there is a current
+   *   active trace when the log call is made
+   *
+   * Default true.
+   */
+  apmIntegration?: boolean;
+}
+
+export = (opts?: Config) => Format

loggers/winston/package.json

@@ -3,6 +3,7 @@
   "version": "1.1.0",
   "description": "A formatter for the winston logger compatible with Elastic Common Schema.",
   "main": "index.js",
+  "types": "index.d.ts",
   "files": [
     "index.js"
   ],