Add parenthesis on filter

When combining several filters by calling Filter() multiple times, they will be joined by "and" which is "fine".
The issues comes when there's an or in one of the filters, which will produce unexpected results.
e.g.
Filter(x => x.Foo == "some string")
Filter(x => x.Bar == 1 || x.Bar == 2 )
Should be:
"(Foo eq 'some string') and (Bar eq 1 or Bar eq 2)"
But will be:
"Foo eq 'some string' and Bar eq 1 or Bar eq 2"

Author: sfreidahl

src/OData.QueryBuilder/Expressions/Visitors/ODataOptionFilterExpressionVisitor.cs

@@ -254,10 +254,11 @@ protected override string VisitLambdaExpression(LambdaExpression lambdaExpressio
 
         private bool HasParenthesis(ExpressionType expressionType)
         {
-            var hasParenthesis = _expressionType.HasValue && expressionType switch
+
+            var hasParenthesis = expressionType switch
             {
-                ExpressionType.And => true,
-                ExpressionType.AndAlso => true,
+                ExpressionType.And => true && _expressionType.HasValue,
+                ExpressionType.AndAlso => true && _expressionType.HasValue,
                 ExpressionType.Or => true,
                 ExpressionType.OrElse => true,
                 _ => false,