v3.20.1

• fix: remove all deprecations and php notices and warnings from unit test by @techmahedy in #247
• Entity model namespace remove and \ added for some classes: by @techmahedy in #248
• Readme.md updated by @techmahedy in #249
• Add comprehensive Temporal ORM test coverage by @techmahedy in #250
• remove User model dependencey from framework core code by @techmahedy in #251
• change config() method return type to mixed: by @techmahedy in #252