fix count type

src/aggregation/metric/average.rs

@@ -37,7 +37,7 @@ impl AverageAggregation {
 #[derive(Default, Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct IntermediateAverage {
     pub(crate) sum: f64,
-    pub(crate) doc_count: u32,
+    pub(crate) doc_count: u64,
 }
 
 impl IntermediateAverage {

src/aggregation/metric/stats.rs

@@ -40,7 +40,7 @@ impl StatsAggregation {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct Stats {
     /// The number of documents.
-    pub count: u32,
+    pub count: u64,
     /// The sum of the fast field values.
     pub sum: f64,
     /// The standard deviation of the fast field values. `None` for count == 0.
@@ -74,7 +74,7 @@ impl Stats {
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub struct IntermediateStats {
     /// the number of values
-    pub count: u32,
+    pub count: u64,
     /// the sum of the values
     pub sum: f64,
     /// the squared sum of the values