Update dispute status

<blockquote><strong>Important:</strong> This method is for sandbox use only.</blockquote> Updates the status of a dispute, by ID, from <code>UNDER_REVIEW</code> to either:<ul><li><code>WAITING_FOR_BUYER_RESPONSE</code></li><li><code>WAITING_FOR_SELLER_RESPONSE</code></li></ul>This status change enables either the customer or merchant to submit evidence for the dispute. To make this call, the dispute <code>status</code> must be <code>UNDER_REVIEW</code> and <code>require-evidence</code> link should be available in the <a href="/docs/api/customer-disputes/v1/#disputes_get!c=200&path=links&t=response/">HATEOAS links</a> of the <a href="/docs/api/customer-disputes/v1/#disputes_get">show dispute details</a> response. Specify an <code>action</code> value in the JSON request body to indicate whether the status change enables the customer or merchant to submit evidence:<table><thead><tr align="left"><th>If <code>action</code> is</th><th>The <code>status</code> updates to</th></tr></thead><tbody><tr><td><code>BUYER_EVIDENCE</code></td><td> <code>WAITING_FOR_BUYER_RESPONSE</code></td></tr><tr><td><code>SELLER_EVIDENCE</code></td><td> <code>WAITING_FOR_SELLER_RESPONSE</code></td></tr></tbody></table>.