Fix timzone issue, thanks to lijiebio@foxmail.com

src/main.py

@@ -22,6 +22,7 @@ def init_cal(cal, name):
     # required by outlook
     tz = Timezone()
     tz.add("Ttzid", "China Standard Time")
+    cal.add_component(tz)
     return cal
 
 def gen_cal(cal, ev_dct, dest):