Guillotina

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- Nothing changed yet.

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- Some fixes and improvements to the new TransactionConnectionContextManager
[masipcat]

- Port the following changes:
- Remove db transaction strategy support
- Try not to reserve connection when possible
[vangheem]

- Black to 21.10b0 version
[bloodbare]

- Add the possibility of configuring the ttl of the email_validation
using app_settings["ttl_email_validation"] in the utility of the
email_validation. By default is 3660s.
[nilbacardit26]
- Fix docs: Create group with id/name
[ksuess]

- doc: installation: fix duplicated line and link to contrib/dbusers
[jotare]

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- Add support for Python 3.10
[masipcat]
- Reimplemented IRedisUtility to adapt to aioredis v2.0 breaking changes
[masipcat]
- Removed argument 'loop' from utilities initialization (following Python 3.10 changes)
[masipcat]
- Upgraded dev dependencies
[masipcat]

- Fix searching by SearchableText
[frapell]

- Fix vocabulray country code AN

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- fix: Add MIMEMultipart('alternative') to attach message in parent MIMEMultipart to render only html body.
[rboixaderg]

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- feat: Change MIMEMultipart 'alternative' to 'mixed'. Outlook and Thunderbird not recieve attachment when use 'alternative'
- chore: fix version aioredis 1.3.1
[rboixaderg]

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- Mask Textline field to recover masked values on get
[bloodbare]

- Fix navigate_to() crashes with 'AttributeError' when traversing to a non-folderish object
[masipcat]