Update CI script

3 jobs for master in 6 minutes and 40 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #73893066
build

00:04:19

 
  Test
failed #73893067
lint

00:02:21

failed #73893068
test

00:02:01

 
Name Stage Failure
failed
lint Test
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the [email protected] lint script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm WARN Local package.json exists, but node_modules missing, did you mean to install?

npm ERR! A complete log of this run can be found in:
npm ERR! /root/.npm/_logs/2018-06-10T13_48_16_580Z-debug.log
ERROR: Job failed: exit code 1
failed
test Test
/bin/bash: line 61: Xvfb: command not found
$ npm test

> [email protected] test /builds/thealik/clcalc
> ./node_modules/karma/bin/karma start karma.conf.js

sh: 1: ./node_modules/karma/bin/karma: not found
npm ERR! Test failed. See above for more details.
ERROR: Job failed: exit code 1