Fixing compiler issue when trying compile on Swift 5.6.3

Upgraded SwiftPatches to 2.0.8

Updated XcodeProjectBuilders.INTERNAL_OBJECT_VERSION_DEFAULT_DETAILS …

…to include newer versions

Removed PBXProj/CodableHelpers+PBXProj.swift as it is nolonger refere…

…nced due to moving away from CodableHelpers.

Upped minimim version requirements for AdvancedCodableHelper to 1.1.1…

…. Changed all references of CodableHelpers to there appropriate encoder/decoder methods to remove warnings

Added support for removing file system objects from project

Made some methods / properties publicly available for use wihtin othe…

…r projects

Added fixes and new methods to support basic Xcode Project maintenanc…

…e methods

Updated all PBX and Xcode classes to inherit NSObject

Updated to compile on Swift 5.1