Upgrade python-telegram-bot to 6.0.1

[fabaff]

6.0.1

• Add support for User.language_code
• Fix Message.text_html and Message.text_markdown for messages with emoji

6.0.0

• Add support for Bot API 2.3.1
• Add support for deleteMessage API method
• New, simpler API for JobQueue - JobQueue: Simpler API for adding jobs python-telegram-bot/python-telegram-bot#484
• Download files into file-like objects - Download changed python-telegram-bot/python-telegram-bot#459
• Use vendor urllib3 to address issues with timeouts
  • The default timeout for messages is now 5 seconds. For sending media, the default timeout is now 20 seconds.
• String attributes that are not set are now None by default, instead of empty strings
• Add text_markdown and text_html properties to Message - Added methods to generate the original markdown/html string from entities contained in Message python-telegram-bot/python-telegram-bot#507
• Add support for Socks5 proxy - Add support for Socks5 proxy. python-telegram-bot/python-telegram-bot#518
• Add support for filters in CommandHandler - Add filters to commandHandler python-telegram-bot/python-telegram-bot#536
• Add the ability to invert (not) filters - Add the ability to invert (not) filters python-telegram-bot/python-telegram-bot#552
• Add Filters.group and Filters.private
• Compatibility with GAE via urllib3.contrib package - Compatibility with GAE via urllib3.contrib package python-telegram-bot/python-telegram-bot#583
• Add equality rich comparision operators to telegram objects - Add equality rich comparision operators to telegram objects python-telegram-bot/python-telegram-bot#604
• Several bugfixes and other improvements
• Remove some deprecated code

Tested with the following configuration:

telegram_bot:
  platform: polling
  api_key: !secret telegram_api
  allowed_chat_ids:
    - !secret telegram_client

notify:
  - platform: telegram
    name: telegram
    chat_id: !secret telegram_client

Message sent with "Call Service"

{"message": "The sun is {% if is_state('sun.sun', 'above_horizon') %}up{% else %}down{% endif %}!"}

[mention-bot]

@fabaff, thanks for your PR! By analyzing the history of the files in this pull request, we identified @azogue, @sander76 and @balloob to be potential reviewers.

[azogue]

Could I propose a minimal correction when rendering template attributes:

in the _render_template_attr at line 221:

if attribute_templ:
    if not isinstance(attribute_templ, str):
        attribute_templ.hass = hass
        data[attribute] = attribute_templ.async_render()
    else:
        data[attribute] = attribute_templ

When messages come from the notify.telegram platform, they come rendered, so it's failing here with an AttributeError.

This change fixes #7705

[azogue]

@fabaff

Also, when testing the changes with the webhooksplatform, I have suffered a pair of TimeOut errors in the setup, when calling to bot.setWebhook. Maybe we should pass a timeout of 10s to be generous there...

On the other hand, I have not encountered any more problems with the new version. With some time I will try to explore the new features of the API.

[fabaff]

Your proposed changes for the template rendering are included in #7709.

I don't use webhooks but timeouts are always good to avoid open connections which are waiting for the server.