Add deployment target for iOS and macOS in podspec

[MacTHEgenius]

Description

Added deployment target for macOS (OS X). I still needed to add a deployment target for iOS in the main spec, not sure if it's the right way to do it since some subspec has one.

Motivation and Context

Need macOS target support for the Pod.

How Has This Been Tested?

It has been tested in an Xcode project with an iOS and a macOS target with a Podfile as this:

require_relative 'podspec_versions.rb'

ENV['TRIKOT_FRAMEWORK_NAME']='Shared'

target 'AppForiOS' do
  use_frameworks!
  platform :ios, '15.0'
  trikotVersion = properties['versions']['trikot']
  pod 'Trikot/kword', :path => '../../trikot', :inhibit_warnings => true
end

target 'AppForMac' do
  use_frameworks!
  platform :macos, '12.0'
  trikotVersion = properties['versions']['trikot']
  pod 'Trikot/kword', :path => '../../trikot', :inhibit_warnings => true
end

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)