v1.2.22 新增万圣节、万圣节前夜；新增全国中小学生安全教育日；新增春社（原二月初二春社改为社日节）、秋社；优化代码。

src/main/java/com/nlf/calendar/LunarYear.java

@@ -50,27 +50,27 @@ public class LunarYear {
   /**
    * 农历年
    */
-  private int year;
+  private final int year;
 
   /**
    * 天干下标
    */
-  private int ganIndex;
+  private final int ganIndex;
 
   /**
    * 地支下标
    */
-  private int zhiIndex;
+  private final int zhiIndex;
 
   /**
    * 农历月们
    */
-  private List<LunarMonth> months = new ArrayList<LunarMonth>();
+  private final List<LunarMonth> months = new ArrayList<LunarMonth>();
 
   /**
    * 节气儒略日们
    */
-  private List<Double> jieQiJulianDays = new ArrayList<Double>();
+  private final List<Double> jieQiJulianDays = new ArrayList<Double>();
 
   /**
    * 初始化