addImage(src, alt, options) {
        const { width, height } = options || {};
        const attrs = Object.assign(Object.assign({}, (width && { width })), (height && { height }));
        const element = this.wrap('img', null, Object.assign({ src, alt }, attrs));
        return this.addRaw(element).addEOL();
    }
Adds an HTML image tag to the summary buffer

@param {string} src path to the image you to embed
@param {string} alt text description of the image
@param {SummaryImageOptions} options (optional) addition image attributes

@returns {Summary} summary instance