Added support for SLOP. Changed the int to a pointer (nullable) because SLOP 0 is a valid activity. (#97)

Co-authored-by: filipe oliveira <[email protected]>

Author: devinsburke

redisearch/query.go

@@ -79,7 +79,7 @@ type Query struct {
 
 	Paging Paging
 	Flags  Flag
-	Slop   int
+	Slop   *int
 
 	Filters       []Filter
 	InKeys        []string
@@ -139,6 +139,10 @@ func (q Query) serialize() redis.Args {
 		args = args.Add("NOCONTENT")
 	}
 
+	if q.Slop != nil {
+		args = args.Add("SLOP", *q.Slop)
+	}
+
 	if q.Flags&QueryInOrder != 0 {
 		args = args.Add("INORDER")
 	}