Method update

src/js/charts/Heatmap.js:143–151

(data)

	}

	update(data) {
		if(!data) {
			console.error('No data to update.');
		}

		this.data = this.prepareData(data);
		this.draw();
		this.bindTooltip();
	}

	bindTooltip() {
		this.container.addEventListener('mousemove', (e) => {