update readme

2 jobs for master in 1 minute and 44 seconds (queued for 22 seconds)
Status Job ID Name Coverage
  Test
failed #6042
nodejs
audit

00:01:37

passed #6041
nodejs
lint

00:01:44

 
Name Stage Failure
failed
audit Test
                                                                                
More info https://npmjs.com/advisories/1555



found 5 vulnerabilities (4 low, 1 high) in 323 scanned packages
run `npm audit fix` to fix 5 of them.
Cleaning up file based variables
ERROR: Job failed: exit code 1