Fix lint warnings

Author: danielsaidi

Diff for: .swiftlint.yml

@@ -4,6 +4,7 @@ disabled_rules:
   - large_tuple
   - line_length
   - nesting
+  - operator_whitespace
   - todo
   - trailing_whitespace
   - type_name

Diff for: Sources/SwiftUIKit/Pickers/ColorPickerBar.swift

@@ -313,10 +313,10 @@ struct ColorPickerBar_Previews: PreviewProvider {
         private var color3: Color = .purple
 
         @State
-        private var optionalColor: Color? = nil
+        private var optionalColor: Color?
 
         @State
-        var optionalDouble: Double? = nil
+        var optionalDouble: Double?
 
         var pickers: some View {
             VStack(alignment: .leading) {