message: fix(ionic4): use headless chrome without sandbox
diff: // Karma configuration file, see link for more information
  // https://karma-runner.github.io/1.0/config/configuration-file.html
  +process.env.CHROME_BIN = require('puppeteer').executablePath()
  +
  module.exports = function(config) {
  config.set({
  basePath: '',
  @@ -10,22 +12,31 @@ module.exports = function(config) {
  require('karma-chrome-launcher'),
  require('karma-jasmine-html-reporter'),
  require('karma-coverage-istanbul-reporter'),
  + require('karma-spec-reporter'),
  require('@angular-devkit/build-angular/plugins/karma')
  ],
  client: {
  clearContext: false // leave Jasmine Spec Runner output visible in browser
  },
  coverageIstanbulReporter: {
  - dir: require('path').join(__dirname, '../coverage'),
  - reports: ['html', 'lcovonly', 'text-summary'],
  + reports: ['text', 'lcovonly'],
  fixWebpackSourcePaths: true
  },
  - reporters: ['progress', 'kjhtml'],
  + specReporter: {
  + suppressSkipped: false // do not print information about skipped tests
  + },
  + reporters: ['spec', 'coverage-istanbul'],
  port: 9876,
  colors: true,
  logLevel: config.LOG_INFO,
  autoWatch: true,
  - browsers: ['Chrome'],
  + browsers: ['ChromeHeadlessNoSandbox'],
  + customLaunchers: {
  + ChromeHeadlessNoSandbox: {
  + base: 'ChromeHeadless',
  + flags: ['--no-sandbox']
  + }
  + },
  singleRun: false
  })
  }
  