Upgrade python to 3.8

[fulder]

Upgrade plugins (with no opened PRs) from old python 3.7 version to 3.8 and add the python3 packages for easier plugin maintenance (where python3 binaries can be used instead of upgrading them for every minor python release)

Closes: #230

---

Thank you for your submission to the FreeNAS community plugins repository!

Please ensure the following guidelines are met when submitting a new Plugin.

1. Add the entry to INDEX in alphabetical order
2. Includes a new icon in the ./icon/ directory
3. Ensure the submitted icon file is a valid PNG that is 128x128 in size
4. Add new plugin cirrus task

[sonicaj]

@fulder can you please confirm if we are not regressing for esphome ?

[fulder]

@sonicaj, from my understanding esphome should be ready for this change. The current cirrus task is failing due to the plugin being hardcoded to the python3.7 version. Once this is merge, the plugin PR here should be merged as well: tprelog/iocage-esphome#7 or is there something I've missed regarding this plugin (like Home Assistant) @tprelog (I'm guessing it is fine because of your comment in the PR, just doublechecking 😺 ) ?

[sonicaj]

Thank you for clarifying @fulder, let's wait for @tprelog to confirm/merge and we can merge this asap as well then :)

[tprelog]

@sonicaj - Let's go ahead and merge this.

I can merge @fulders pull request in the ESPHome repo as well

[sonicaj]

Awesome, thank you @tprelog for confirming

[tprelog]

I just merged @fulder pull request on my end for ESPHome

[fulder]

Thanks for the merges! :)