upgrade cache size

Author: lvyahui8

spring-boot-data-aggregator-core/src/main/java/io/github/lvyahui8/spring/aggregate/consts/AggregationConstant.java

@@ -7,5 +7,5 @@
 public interface AggregationConstant
 {
  Object EMPTY_MODEL = new Object();
- int DEFAULT_INITIAL_CAPACITY = 8;
+ int DEFAULT_INITIAL_CAPACITY = 32;
 }