修复立春至正月初一之间八字年月柱错误的问题；新增支持农历日期的推移。

src/test/java/test/BaZiTest.java

@@ -22,6 +22,33 @@ public class BaZiTest {
     Assert.assertEquals("时柱", "壬辰", eightChar.getTime());
   }
 
+  @Test
+  public void testGanZhi2() {
+    Solar solar = new Solar(1988, 2, 15, 23, 30, 0);
+    Lunar lunar = solar.getLunar();
+    EightChar eightChar = lunar.getEightChar();
+    Assert.assertEquals("年柱", "戊辰", eightChar.getYear());
+    Assert.assertEquals("月柱", "甲寅", eightChar.getMonth());
+    Assert.assertEquals("日柱", "辛丑", eightChar.getDay());
+    Assert.assertEquals("时柱", "戊子", eightChar.getTime());
+
+    solar = new Solar(1988, 2, 15, 22, 30, 0);
+    lunar = solar.getLunar();
+    eightChar = lunar.getEightChar();
+    Assert.assertEquals("年柱", "戊辰", eightChar.getYear());
+    Assert.assertEquals("月柱", "甲寅", eightChar.getMonth());
+    Assert.assertEquals("日柱", "庚子", eightChar.getDay());
+    Assert.assertEquals("时柱", "丁亥", eightChar.getTime());
+
+    solar = new Solar(1988, 2, 2, 22, 30, 0);
+    lunar = solar.getLunar();
+    eightChar = lunar.getEightChar();
+    Assert.assertEquals("年柱", "丁卯", eightChar.getYear());
+    Assert.assertEquals("月柱", "癸丑", eightChar.getMonth());
+    Assert.assertEquals("日柱", "丁亥", eightChar.getDay());
+    Assert.assertEquals("时柱", "辛亥", eightChar.getTime());
+  }
+
   @Test
   public void testHideGan() {
     Solar solar = new Solar(2005, 12, 23, 8, 37, 0);

src/test/java/test/LunarTest.java

@@ -1,6 +1,7 @@
 package test;
 
 import com.nlf.calendar.Lunar;
+import com.nlf.calendar.Solar;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -20,4 +21,13 @@ public class LunarTest {
     Assert.assertEquals("2019-05-01 00:00:00 星期三 (劳动节) 金牛座",date.getSolar().toFullString());
   }
 
+  @Test
+  public void testNext(){
+    Solar solar = new Solar(2020,1,10,12,0,0);
+    Lunar lunar = solar.getLunar();
+    for(int i=-500;i<500;i++){
+      Assert.assertEquals("推移天数："+i,solar.next(i).getLunar().toFullString(),lunar.next(i).toFullString());
+    }
+  }
+
 }