add bool value

Author: rcarver

Sources/ElasticsearchQueryBuilder/Encoding.swift

@@ -6,6 +6,8 @@ extension QueryValue: Encodable {
         switch self {
         case let .array(value):
             try container.encode(value)
+        case let .bool(value):
+            try container.encode(value)
         case let .date(value, format: format):
             switch format {
             case .secondsSince1970:

Sources/ElasticsearchQueryBuilder/QueryValue.swift

@@ -4,6 +4,7 @@ public typealias QueryDict = [ String : QueryValue ]
 
 public enum QueryValue: Equatable {
     case array([QueryValue])
+    case bool(Bool)
     case date(Date, format: QueryDateFormat)
     case dict(QueryDict)
     case float(Float)
@@ -45,6 +46,12 @@ extension QueryValue: ExpressibleByArrayLiteral {
     }
 }
 
+extension QueryValue: ExpressibleByBooleanLiteral {
+    public init(booleanLiteral value: Bool) {
+        self = .bool(value)
+    }
+}
+
 extension QueryValue: ExpressibleByDictionaryLiteral {
     public init(dictionaryLiteral elements: (String, QueryValue)...) {
         var dict = QueryDict()

Tests/ElasticsearchQueryBuilderTests/ComponentTests.swift

@@ -191,7 +191,8 @@ final class KNearestNeighborTests: XCTestCase {
         @ElasticsearchQueryBuilder func build() -> some esb.QueryDSL {
             esb.KNearestNeighbor("vector_field", [1,2,3]) {
                 [
-                    "k": 5
+                    "k": 5,
+                    "index": true
                 ]
             } filter: {
                 esb.Key("match_bool_prefix") {
@@ -206,6 +207,7 @@ final class KNearestNeighborTests: XCTestCase {
                 "field": "vector_field",
                 "query_vector": [1.0, 2.0, 3.0],
                 "k": 5,
+                "index": true,
                 "filter": [
                     [
                         "match_bool_prefix": [