fix: add this to hooks.logMethod (#1559)

Author: SimenB

pino.d.ts

@@ -600,7 +600,7 @@ declare namespace pino {
              * log method and method is the log method itself, and level is the log level. This hook must invoke the method function by
              * using apply, like so: method.apply(this, newArgumentsArray).
              */
-            logMethod?: (args: any[], method: LogFn, level: number) => void;
+            logMethod?: (this: Logger, args: any[], method: LogFn, level: number) => void;
         };
 
         /**

test/types/pino.test-d.ts

@@ -1,7 +1,7 @@
 import P, { pino } from "../../";
 import { IncomingMessage, ServerResponse } from "http";
 import { Socket } from "net";
-import { expectError } from 'tsd'
+import { expectError, expectType } from 'tsd'
 import Logger = P.Logger;
 
 const log = pino();
@@ -229,6 +229,7 @@ const withNestedKey = pino({
 const withHooks = pino({
     hooks: {
         logMethod(args, method, level) {
+            expectType<pino.Logger>(this);
             return method.apply(this, ['msg', ...args]);
         },
     },
@@ -344,4 +345,4 @@ cclog3.childLevel2('')
 const withChildCallback = pino({
     onChild: (child: Logger) => {}
 })
-withChildCallback.onChild = (child: Logger) => {}
+withChildCallback.onChild = (child: Logger) => {}