title: how can i run all webdriver.io spec files in single browser session?
body: <p>I'm using wdio to run tests. I reduced maxInstances to 1.But wdio logging indicates that it creates a new session before each spec file. How can i run all webdriver.io spec files in single browser session?Thank you in advance.</p>
  
  <p>wdio.conf.js is:</p>
  
  <pre><code>exports.config = {
    specs: ['./test/specs/**/*.js'],
    maxInstances: 1,
    capabilities: [{
      maxInstances: 1,
      browserName: 'chrome',
    }],
    sync: true,
    logLevel: 'verbose',
    coloredLogs: true,
    screenshotPath: './errorShots/',
    baseUrl: process.env.ROOT_URL,
    waitforTimeout: 10000,
    connectionRetryTimeout: 90000,
    connectionRetryCount: 3,
    services: ['chromedriver'],
    framework: 'mocha',
    reporters: ['dot', 'spec', 'allure'],
    mochaOpts: {
      ui: 'bdd',
      timeout: 99999999
    },
  }
  </code></pre>