Blurred lines after updating from 2.6.0 to 2.7.2

[antonwrld]

Before updating from 2.6.0 to 2.7.2 grid lines in my line charts where clear.
And after updating grid lines became blurred.

https://codepen.io/anon/pen/xjbPPB

I understand that when the line is horizontal and 1 pixel wide it is drawn half-way between 2 pixels to be smoother. But is there any way to fix this issue? Maybe to move such lines a bit to be strongly 1 pixel wide. In my (and I believe in most other cases) it's very important to avoid blurred lines.

lineWidth 0.5 can't solve this issue.

Browser name and version: Google Chrome 65.0.3325.181