Include parameter name in ArgumentNullException for SDK version types (#186)

Add nameof(version) to all ArgumentNullException throws in
AppleSdkVersion, IPhoneSdkVersion, and MacOSXSdkVersion constructors
for better diagnostics. The int[] overload in AppleSdkVersion already
did this correctly; this makes the other constructors consistent.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: rmarinho

Xamarin.MacDev/AppleSdkVersion.cs

@@ -38,7 +38,7 @@ public struct AppleSdkVersion : IComparable<AppleSdkVersion>, IEquatable<AppleSd
 		public AppleSdkVersion (Version version)
 		{
 			if (version == null)
-				throw new ArgumentNullException ();
+				throw new ArgumentNullException (nameof (version));
 
 			if (version.Build != -1) {
 				this.version = new int [3];

Xamarin.MacDev/IPhoneSdkVersion.cs

@@ -38,7 +38,7 @@ public struct IPhoneSdkVersion : IComparable<IPhoneSdkVersion>, IEquatable<IPhon
 		public IPhoneSdkVersion (Version version)
 		{
 			if (version == null)
-				throw new ArgumentNullException ();
+				throw new ArgumentNullException (nameof (version));
 
 			if (version.Build != -1) {
 				this.version = new int [3];
@@ -54,7 +54,7 @@ public IPhoneSdkVersion (Version version)
 		public IPhoneSdkVersion (params int [] version)
 		{
 			if (version == null)
-				throw new ArgumentNullException ();
+				throw new ArgumentNullException (nameof (version));
 
 			this.version = version;
 		}

Xamarin.MacDev/MacOSXSdkVersion.cs

@@ -36,7 +36,7 @@ public struct MacOSXSdkVersion : IComparable<MacOSXSdkVersion>, IEquatable<MacOS
 		public MacOSXSdkVersion (params int [] version)
 		{
 			if (version == null)
-				throw new ArgumentNullException ();
+				throw new ArgumentNullException (nameof (version));
 			this.version = version;
 		}
 
@@ -48,7 +48,7 @@ void IAppleSdkVersion.SetVersion (int [] version)
 		public MacOSXSdkVersion (Version version)
 		{
 			if (version == null)
-				throw new ArgumentNullException ();
+				throw new ArgumentNullException (nameof (version));
 			this.version = new [] { version.Major, version.Minor };
 		}