pm2-docker splits logs every 65356 bytes with newlines. Breaks JSON output.

If we have a script which console.log's 66k json file it will be split with newline at 65536 byte even in pm2-docker --raw mode.

Expected behaviour

pm2-docker --raw print_66k_JSON.js
should only output one line with JSON.

Actual behaviour

Outputs 2 lines split at 65356 bytes.

Steps to reproduce

Create print_66k_JSON.js:

const fs = require('fs')
console.log(fs.readFileSync('./66k.txt', 'utf8'))
setTimeout(() => {}, 1000 * 60 * 60 * 30) // to avoid auto-restart by pm2

Create ./66k.txt file with 66 text in it.
Run pm2-docker --raw print_66k_JSON.js

Observe line break at 65356 byte

Software versions used

OS         : Tried MacOS 10.12.2 and official docker image `node:7.2.0`
node.js    : 6.3.0 or 7.2.0 (tried both)
PM2        : 2.2.2

Reproduce the issue with pm2-docker --raw using print_66k_JSON.js and 66k.txt, then inspect the raw-output path handling large console output. Done means the 66k JSON content is emitted as one line without an inserted newline, while normal output behavior remains intact.