日期范围包含不可选日期

[lingling-ding]

Ionic version: (check one with "x")
[ ] 2.x
[ ] 3.x
[ ] 4.x

Ion2-calendar mode: (check one with "x")
[ ] components mode
[ ] modal mode

I'm submitting a ... (check one with "x")
[ ] bug report
[ ] feature request
[ ] help me

Current behavior:

日期范围包含不可选日期

Expected behavior:

如果日期范围包含不可选日期，应该不能被选中

Steps to reproduce:

Related code:

insert short code snippets here

Other information:

Ionic info: (run ionic info from a terminal/cmd prompt and paste output below):

insert the output from ionic info here