travis queue is too long...

this month: average 1100min
![Screenshot from 2021-06-17 20-32-09](https://user-images.githubusercontent.com/9300063/122388954-5ce80980-cfab-11eb-9c16-c9075f6334d2.png)

this week: 3600min
![Screenshot from 2021-06-17 20-32-56](https://user-images.githubusercontent.com/9300063/122388951-5c4f7300-cfab-11eb-992a-442cddbbe204.png)

