Method update

src/plugins/plugin.legend.js:82–90

(maxWidth, maxHeight, margins)

  }

  update(maxWidth, maxHeight, margins) {
    this.maxWidth = maxWidth;
    this.maxHeight = maxHeight;
    this._margins = margins;

    this.setDimensions();
    this.buildLabels();
    this.fit();
  }

  setDimensions() {
    if (this.isHorizontal()) {