feature request: support puppeteer and subsequently DevTools protocol

[vobu]

I did quite some debugging and it turns out there is a difference in our project's wdio test configuration.
We are not using 'chromedriver' in service list. So the wdio defaults to puppeteer in our case. That is not dealing well with caching the retrieved elements and fails the test with 'notFound' timeout when we try to access control method.

Please try using this configuration:

const { join } = require("path")
const { baseConfig } = require("./wdio.base.conf")
const merge = require("deepmerge")

const _config = {
    wdi5: {
        url: "#"
    },
    specs: [join("webapp", "test", "e2e", "**/*.test.js")],
    exclude: [join("webapp", "test", "e2e", "ui5-late.test.js")],
    baseUrl: "http://localhost:8888"
}

const mergedConfig = merge(baseConfig, _config)

mergedConfig.wdi5.services = ['ui5']
exports.config = mergedConfig

And run this test on your Sample page:

   it("check button title", async () => {
        const button = await browser.asControl({
            selector: {
                id: "openDialogButton",
                viewName: "test.Sample.view.Main"
            }
        })
        expect(await button.getText()).toBe('open Dialog')
    })

You will get a timeout on await button.getText()

So if you are supporting the configuration without chromedriver or standalone-selenium services, then this bug should be looked into.

Originally posted by @edvardas-kireilis in #267 (comment)