Add PHP 8.0 support

• Update composer and PHP libraries
• Require PHP >=7.4 or >=8.0

Documents updates

• Update correct URL of the package.

Bug fixes

• Fix #16

Update dependencies

Update dependencies to match latest versions

Rename from leean to lean namespace

Update of namespaces in order to use the new namespace.

Add LeeanRecent widget

Merge pull request #14 from moxie-leean/recent

Recent posts widget

Fix duplicated widgets

Merge pull request #12 from moxie-leean/widget-instance

Add a function to get the instance of a widget

Prefixes

Prefix field names in collections to avoid collissions

Social Items

Merge pull request #10 from moxie-leean/social-links

Social Links element

Contact details

Merge pull request #8 from moxie-leean/contact-details

Contact details widget