Merge pull request #2 from dankinsoid/main

- new HTTP header key logic
- http url additions
- other minor fixes & improvements

Author: tib

Package.swift

@@ -4,10 +4,10 @@ import PackageDescription
 let package = Package(
     name: "swift-http",
     platforms: [
-        .macOS(.v12),
-        .iOS(.v15),
-        .tvOS(.v15),
-        .watchOS(.v8),
+        .macOS(.v10_15),
+        .iOS(.v13),
+        .tvOS(.v13),
+        .watchOS(.v6)
     ],
     products: [
         .library(name: "SwiftHttp", targets: ["SwiftHttp"]),