Include ticks in countTimers

[SimenB]

We understand you have a problem and are in a hurry, but please provide us with some info to make it much more likely for your issue to be understood, worked on and resolved quickly.

• Lolex version : 4.0.1
• Environment : Node 10
• Example URL : N/A
• Other libraries you are using: N/A

What did you expect to happen?
See jestjs/jest#8139 for justification. Tl;dr; is that a timer count should include all scheduled timers and friends, not just timers.

What actually happens

clock.nextTick does not contribute to the count

How to reproduce

const lolex = require("lolex");

const clock = lolex.createClock();

clock.setTimeout(() => {}, 5);
clock.nextTick(() => {});

console.log(clock.countTimers()); // 1

[benjamingr]

Sounds reasonable to me and easy to fix