Add keypath method handling for predicate macro.

Author: amritpan

Sources/FoundationMacros/PredicateMacro.swift

@@ -393,6 +393,8 @@ extension KeyPathExprSyntax {
                 }
             case .subscript(let sub):
                 result = ExprSyntax(SubscriptCallExprSyntax(calledExpression: result, arguments: sub.arguments))
+            case .method(let method):
+                result = ExprSyntax(FunctionCallExprSyntax(calledExpression: method, arguments: method.arguments))
 #if FOUNDATION_FRAMEWORK
             default:
                 return nil