feat: appium v2 support

[kobenguyent]

Motivation/Description of the PR

• appium v2 support
• migration guide: https://github.com/codeceptjs/CodeceptJS/wiki/Migration-to-Appium-v2---CodeceptJS

Applicable helpers:

• Appium

Type of change

• 🔥 Breaking changes

Checklist:

• Tests have been added
• Documentation has been added (Run npm run docs)
• Lint checking (Run npm run lint)
• Local tests are passed (Run npm test)

[Arhell]

@DavertMik

[ChetanChohan7]

@kobenguyent I was taking a look at this as it's of interest to my current work. I noticed in the appium helper file there are several instances where "browser" is misspelt as, "broswer". See lines 192 and 197 in /helper/appium.js

[xuanmai-agilityio]

@kobenguyent I also found another issue with the _startBrowser function, when Appium runs the 2nd test case, it will run this function and will convert the existing options to add one more appium: prefix in the config.
So I think we need to check and only convert it one time when the Appium starts.
So I've updated it as below and it runs smoothly. Hope this help!

[kobenguyent]

@kobenguyent I also found another issue with the _startBrowser function, when Appium runs the 2nd test case, it will run this function and will convert the existing options to add one more appium: prefix in the config. So I think we need to check and only convert it one time when the Appium starts. So I've updated it as below and it runs smoothly. Hope this help!

Thanks @xuanmai-agilityio, issue has been addressed!

[DavertMik]

Thank you, @kobenguyent
I think we are ready to merge this one.
Sorry for the delay in reviewing it