Headless-mode updates for reliability

Mostly headless-mode updates:

• Make headless Chrome more reliable in Docker environments
• Update pytest requirements

Pytest update (Use pytest >= 4.6.2)

Pytest update:

• Use pytest >= 4.6.2

Performance improvements

Performance improvements

• Switch to Cloudflare CDN for jQuery
• Update urllib3, requests, and pluggy versions
  -- urllib3==1.25.3
  -- requests>=2.22.0
  -- pluggy>=0.12.0

Update requirements (Python and jQuery)

Update requirements

Updated Python requirements:

• setuptools>=41.0.1
• certifi>=2019.3.9
• PyVirtualDisplay==0.2.1

jQuery:

• 3.4.1

Use pytest>=4.5.0

Use pytest>=4.5.0

• Also ignore pytest warnings such as PytestUnknownMarkWarning, which caused warnings to appear for test-specific markers

Update pytest version and other requirements

Update pytest version and other requirements

• pytest>=4.4.2
• pytest-cov>=2.7.1
• pluggy>=0.11.0
• pip>=19.1.1

Update requirements (prevent SSL errors)

Update requirements:

• Add pyopenssl with version >=19.0.0 to prevent SSL errors.
  (See https://stackoverflow.com/a/29099439)
• Make sure pip installs with version >=19.1.1
  (Unrelated, but allows using developer mode installs)

Update urllib3 version

Update urllib3 version:

Set urllib3 version to 1.24.3

Editable mode install update

Editable mode install update.
Due to pytest-dev/pytest#5167 (pip 19.1 prevents pytest from being used in editable mode), I'm taking out the default pip editable mode install.
All this really means now is that now you should run python setup.py develop after installing the requirements.

Update the tool that generates page objects from selectors

Update the tool that generates page objects from selectors