https://github.com/evcohen/eslint-plugin-jsx-a11y/blob/master/docs/rules/click-events-have-key-events.md
It seems this rule is to enforce Accessibility standards.
Based on this, change your code to do something like this
<div className="magicHelper" onClick={this.handleClick} onKeyDown={this.handleClick}>
You could also disable the rule in eslint, I suppose it depends on preference.