making http-lambda-proxy an optional dependency

Author: jkyberneees

lib/proxy-factory.js

@@ -1,6 +1,5 @@
 'use strict'
 const fastProxy = require('fast-proxy')
-const lambdaProxy = require('http-lambda-proxy')
 
 module.exports = ({ proxyType, opts, route }) => {
   let proxy
@@ -11,7 +10,7 @@ module.exports = ({ proxyType, opts, route }) => {
       ...(opts.fastProxy)
     }).proxy
   } else if (proxyType === 'lambda') {
-    proxy = lambdaProxy({
+    proxy = require('http-lambda-proxy')({
       target: opts.targetOverride || route.target,
       region: 'eu-central-1',
       ...(route.lambdaProxy || {})