perf!: centeral timekeeping

This should improve performance, especially when running simulations with
multiple peripherals. For instance, the demo project now runs at ~322%,
up from ~185% in AVR8js 0.13.1.

BREAKING CHANGE: `tick()` methods were removed from individual peripherals.
You now need to call `cpu.tick()` instead.

1 files changed, 0 insertions, 4 deletions

diff --git a/demo/src/execute.ts b/demo/src/execute.ts
index 3a065d1..5d5c6b4 100644
--- a/demo/src/execute.ts
+++ b/demo/src/execute.ts
@@ -50,10 +50,6 @@ export class AVRRunner {
     const cyclesToRun = this.cpu.cycles + this.workUnitCycles;
     while (this.cpu.cycles < cyclesToRun) {
       avrInstruction(this.cpu);
-      this.timer0.tick();
-      this.timer1.tick();
-      this.timer2.tick();
-      this.usart.tick();
       this.cpu.tick();
     }