More lemmy fixes (#35)

* Making federation_worker_count optional

* Updating README

Author: fishcharlie

README.md

@@ -15,10 +15,12 @@ We use Swift Package Manager to make it easy to install and use the Lemmy Swift
 
 ```swift
 dependencies: [
-	.package(url: "https://github.com/rrainn/Lemmy-Swift-Client.git", .upToNextMajor(from: "3.0.0"))
+	.package(url: "https://github.com/rrainn/Lemmy-Swift-Client.git", .exact("3.0.0"))
 ]
 ```
 
+Please note, that we do not subscribe to SemVer versioning at this time due to the massive amount of Lemmy API changes. Please consider pinning Lemmy-Swift-Client to a specific version at this time. 
+
 ## Usage
 
 Below is an example of a basic usage example of how to use the Lemmy Swift Client.

Sources/Lemmy-Swift-Client/Lemmy API/Structs/LocalSite.swift

@@ -13,7 +13,7 @@ public struct LocalSite: Codable {
 	public let enable_nsfw: Bool
 	public let federation_debug: Bool?
 	public let federation_enabled: Bool
-	public let federation_worker_count: Int
+	public let federation_worker_count: Int?
 	public let hide_modlog_mod_names: Bool
 	public let id: Int
 	public let legal_information: String?
@@ -40,7 +40,7 @@ public struct LocalSite: Codable {
 		enable_nsfw: Bool,
 		federation_debug: Bool? = nil,
 		federation_enabled: Bool,
-		federation_worker_count: Int,
+		federation_worker_count: Int? = nil,
 		hide_modlog_mod_names: Bool,
 		id: Int,
 		legal_information: String? = nil,