v1.2.1 修复1-99年日期错乱的问题；增加单元测试。

package.json

@@ -1,10 +1,10 @@
 {
   "name": "lunar-javascript",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "lunar is a calendar library for Solar and Chinese Lunar.",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "jest"
   },
   "repository": {
     "type": "git",
@@ -47,5 +47,8 @@
   "bugs": {
     "url": "https://github.com/6tail/lunar-javascript/issues"
   },
-  "homepage": "https://github.com/6tail/lunar-javascript"
+  "homepage": "https://github.com/6tail/lunar-javascript",
+  "devDependencies": {
+    "jest": "^26.6.3"
+  }
 }