chore: nullable meta.company_id & meta.user_id

Author: DavidRouyer

src/Pipedrive.net/Models/Common/Webhooks/Meta.cs

@@ -22,10 +22,10 @@ public class Meta
         public long Id { get; set; }
 
         [JsonProperty("company_id")]
-        public long CompanyId { get; set; }
+        public long? CompanyId { get; set; }
 
         [JsonProperty("user_id")]
-        public long UserId { get; set; }
+        public long? UserId { get; set; }
 
         [JsonProperty("host")]
         public string Host { get; set; }