fix: update integration tests for nodejs8.10

Author: adieuadieu

packages/lambda/integration-test/handler.js

@@ -3,7 +3,7 @@ const chrome = require('./dist/bundle.cjs.js')
 const cdp = require('chrome-remote-interface')
 
 module.exports.run = async function run (event) {
-  const channel = event.channel || ''
+  const channel = `${event.channel}-` || ''
 
   console.log('started. Channel:', channel)
 

packages/lambda/scripts/test-integration.sh

@@ -23,6 +23,6 @@ fi
 docker run \
   -v "$PWD/integration-test":/var/task \
   -v "$PWD/dist":/var/task/dist \
-  lambci/lambda:nodejs6.10 \
+  lambci/lambda:nodejs8.10 \
   handler.run \
   "{\"channel\": \"$CHANNEL\"}"

packages/serverless-plugin/scripts/test-integration.sh

@@ -25,7 +25,7 @@ unzip -o -d "$TEST_DIRECTORY" .serverless/**.zip
 
 CHROMIUM_VERSION=$(docker run \
   -v "$PWD/$TEST_DIRECTORY":/var/task \
-  lambci/lambda:nodejs6.10 \
+  lambci/lambda:nodejs8.10 \
   src/handler.default | \
   jq -re '.versionInfo.Browser')