Merge pull request #62 from jbttn/jbutton/fix-bool-decoding

Fix boolean decoding for Map objects

Author: paulofaria

Sources/GraphQL/Map/Map.swift

@@ -606,6 +606,10 @@ extension Map : Codable {
         if container.decodeNil() {
             self = .null
         }
+
+        else if let bool = try? container.decode(Bool.self) {
+            self = .bool(bool)
+        }
 
         else if let double = try? container.decode(Double.self) {
             self = .number(Number(double))