Fix searching with special characters

Caps/Extensions/String+Extensions.swift

@@ -0,0 +1,10 @@
+import Foundation
+
+extension String {
+
+    var clean: String {
+        lowercased()
+            .replacingOccurrences(of: "[^a-z0-9 ]", with: "", options: .regularExpression)
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+}