add xcode project file

DualLinkDB

Caos

making compatible with swift 6

making compatible with swift 6

adding nonisolated properties to url data task

Adding compatibility with swift 6.0

adding nonisolated class property

invalidate url cache after exit

Fixes memory leak not releasing the queue in the cache

adding microseconds resolution in Date

adding microsecods date parser

addin iso date formatter

adding headers param

improving queue management