Update for new pyvesyncv_v2 library and vesync switch support

[webdjoe]

Description:

Although the guidelines say to not make trivial edits, I overhauled the older vesync library to support the new outlets and wifi wall switches. I am just updating the pip package used for the vesync switch component. I originally tried to submit a PR for the original vesync library to streamline the changes without impacting HA but the owner hasn't responded in several months. I created a new pip package 'pyvesync_v2' with the same functionality as the original vesync so it would integrate with minimal changes to the component.

**Related issue (if applicable):

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#8746 -

Example entry for configuration.yaml (if applicable):

{Same as original vesync switch component)

switch:
  - platform: vesync
     username: 
     password:

Checklist:

• [X ] The code change is tested and works locally.
• [X ] Local tests pass with tox. Your PR cannot be merged unless tests pass
• [ X] There is no commented out code in this PR.

If user exposed functionality or configuration variables are added/changed:

• [ X] Documentation added/updated in home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• [NA] New dependencies have been added to the REQUIREMENTS variable ([example][ex-requir]).
• New dependencies are only imported inside functions that use them ([example][ex-import]).
• [NA] New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• [NA] New files were added to .coveragerc.

If the code does not interact with devices:

• [NA] Tests have been added to verify that the new code works.

[homeassistant]

Hi @webdjoe,

It seems you haven't yet signed a CLA. Please do so here.

Once you do that we will be able to review and accept this pull request.

Thanks!