fix(types): correct type for createLambdaFunction (#117)

Co-authored-by: Gregor Martynus <[email protected]>

.github/workflows/test.yml

@@ -1,6 +1,10 @@
 name: Test
-
-on: [push]
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types: [opened, synchronize]
 
 jobs:
   test_matrix:

index.d.ts

@@ -1,10 +1,17 @@
 import { Probot } from "probot";
-import { APIGatewayProxyHandler } from "aws-lambda";
+import {
+  APIGatewayProxyEvent,
+  APIGatewayProxyResult,
+  Context,
+} from "aws-lambda";
 import { ApplicationFunction } from "probot/lib/types";
 
 export * from "probot";
 
 export function createLambdaFunction(
   app: ApplicationFunction,
   options: { probot: Probot }
-): APIGatewayProxyHandler;
+): (
+  event: APIGatewayProxyEvent,
+  context: Context
+) => Promise<APIGatewayProxyResult>;