Update README to include v26 (#459) [skip ci]

Author: davdroman

README.md

@@ -224,6 +224,7 @@ extension iOSViewVersion<TextFieldType, UITextField> {
     public static let v16 = Self(for: .v16)
     public static let v17 = Self(for: .v17)
     public static let v18 = Self(for: .v18)
+    public static let v26 = Self(for: .v26)
 }
 
 extension tvOSViewVersion<TextFieldType, UITextField> {
@@ -233,11 +234,13 @@ extension tvOSViewVersion<TextFieldType, UITextField> {
     public static let v16 = Self(for: .v16)
     public static let v17 = Self(for: .v17)
     public static let v18 = Self(for: .v18)
+    public static let v26 = Self(for: .v26)
 }
 
 extension visionOSViewVersion<TextFieldType, UITextField> {
     public static let v1 = Self(for: .v1)
     public static let v2 = Self(for: .v2)
+    public static let v26 = Self(for: .v26)
 }
 #elseif canImport(AppKit)
 extension macOSViewVersion<TextFieldType, NSTextField> {
@@ -247,6 +250,7 @@ extension macOSViewVersion<TextFieldType, NSTextField> {
     public static let v13 = Self(for: .v13)
     public static let v14 = Self(for: .v14)
     public static let v15 = Self(for: .v15)
+    public static let v26 = Self(for: .v26)
 }
 #endif
 ```