fix: correctly check for lambda environment

Author: carbonrobot

src/index.ts

@@ -84,7 +84,7 @@ export type PinoLambdaLogger = Logger & {
  * that provides convinience methods for use with AWS Lambda
  */
 export default (extendedPinoOptions?: ExtendedPinoOptions): PinoLambdaLogger => {
-  if (!isLamdbaExecution) {
+  if (!isLamdbaExecution()) {
     return (pino(extendedPinoOptions) as unknown) as PinoLambdaLogger;
   }
 

src/tests/index.spec.ts

@@ -2,6 +2,7 @@ import tap from 'tap';
 import sinon from 'sinon';
 import pino, { PinoLambdaLogger, ExtendedPinoOptions } from '../index';
 
+process.env.AWS_EXECUTION_ENV = 'AWS_Lambda_nodejs14';
 sinon.useFakeTimers(Date.UTC(2016, 11, 1, 6, 0, 0, 0));
 
 tap.test('should log a simple info message', (t) => {