BUG: as-promise.js should not silently fail, it should display the body of error responses to the user.

Read the error path around parseBody in as-promise.js and trace how the semantic-release GitLab plugin surfaces HTTPError responses. Reproduce the reported 400 response and confirm that its response body is displayed to the user rather than silently omitted.

I am able to show that as-promise.js has a silent failure mode where the body of the request that results in an error is not displayed to the user.

This is not the right place to solve this problem, but I could prove the body was not being reflected to the user by modifying this,

const parseBody = (body, responseType, encoding) => {
    if (responseType === 'json') {
        return body.length === 0 ? '' : JSON.parse(body.toString());
    }
    if (responseType === 'buffer') {
        return Buffer.from(body);
    }
    if (responseType === 'text') {
        return body.toString(encoding);
    }
    throw new TypeError(`Unknown body type '${responseType}'`);
};

const parseBody = (body, responseType, encoding) => {
    console.log( {responseType, body: body.toString(encoding)} );

This gave me much needed contextual information about

[12:29:11 PM] [semantic-release] › ✖  An error occurred while running semantic-release: HTTPError: Response code 400 (Bad Request)
    at EventEmitter.<anonymous> (/home/ecarroll/n/lib/node_modules/@semantic-release/gitlab/node_modules/got/dist/source/as-promise.js:118:31)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5) {
  pluginName: '@semantic-release/gitlab'
}
HTTPError: Response code 400 (Bad Request)
    at EventEmitter.<anonymous> (/home/ecarroll/n/lib/node_modules/@semantic-release/gitlab/node_modules/got/dist/source/as-promise.js:118:31)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:95:5) {
  pluginName: '@semantic-release/gitlab'
}%

this error, such that I could see,

{
  responseType: 'text',
  body: '{"message":"Validation failed: Links have duplicate values (cpanel-angular-validators.js) for #\\u003cRelease:0x00007f0702a43908\\u003e scope"}'
}```

**Note this ticket is for displaying the body of an error response to the user**