Change unread indicator font and weight to match existing iOS parameters

Multiplatform/Shared/Sidebar/UnreadCountView.swift

@@ -14,7 +14,8 @@ struct UnreadCountView: View {
 	
     var body: some View {
 		Text(verbatim: String(count))
-			.font(.footnote)
+			.font(.caption)
+			.fontWeight(.bold)
 			.padding(.horizontal, 7)
 			.padding(.vertical, 1)
 			.background(AppAssets.sidebarUnreadCountBackground)

Shared/Extensions/NSAttributedString+NetNewsWire.swift

@@ -20,7 +20,6 @@ private let monoSpaceTrait = NSFontDescriptor.SymbolicTraits.monoSpace
 import UIKit
 typealias Font = UIFont
 typealias FontDescriptor = UIFontDescriptor
-typealias Color = UIColor
 
 private let boldTrait = UIFontDescriptor.SymbolicTraits.traitBold
 private let italicTrait = UIFontDescriptor.SymbolicTraits.traitItalic