fix(CharSequenceUtil): 新增判空

- 前置判空，方式s.toString导致的NPE

hutool-core/src/main/java/cn/hutool/core/text/CharSequenceUtil.java

@@ -1064,7 +1064,7 @@ public class CharSequenceUtil {
 			return null;
 		}
 		for (CharSequence checkStr : testStrs) {
-			if (str.toString().contains(checkStr)) {
+			if (null != checkStr && str.toString().contains(checkStr)) {
 				return checkStr.toString();
 			}
 		}

hutool-core/src/test/java/cn/hutool/core/util/StrUtilTest.java

@@ -412,6 +412,10 @@ public class StrUtilTest {
 		Assert.assertFalse(containsAny);
 		containsAny = StrUtil.containsAny("aaabbbccc", "d", "c");
 		Assert.assertTrue(containsAny);
+
+		// https://gitee.com/dromara/hutool/issues/I7WSYD
+		containsAny = StrUtil.containsAny("你好啊", "嗯", null);
+		Assert.assertFalse(containsAny);
 	}
 
 	@Test