Cursor blink doesn't work when using WebGL renderer

• I am on the latest Hyper.app version

• I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: macOS Mojave 10.14

• Hyper.app version: 3.0.0

• The issue is reproducible in vanilla Hyper.app: Yes

Issue

Not a duplicate, but might be related to #3533, #3041.

Cursor doesn't blink when using WebGL renderer, but does when using canvas renderer.

Hyper config:

module.exports = {
  config: {
    cursorBlink: true
  }
};

I tested canvas rendering by adding the line backgroundColor: 'rgba(0, 0, 0, 0.9)':

WebGL Renderer has been disabled since it does not support transparent backgrounds yet. Falling back to canvas-based rendering.

Start by locating the WebGL renderer and the cursor-blink implementation, then compare their behavior with the canvas renderer described in the report. Reproduce the issue in Hyper 3.0.0 on macOS with cursorBlink enabled and verify that the cursor blinks under WebGL without changing the canvas behavior.