Use the latest build status when checking docs.rs

When documentation for a crate is rebuilt the `builds.json` can return
multiple results, ordered latest first, so we must take the first
element of the array rather than the last.

services/docsrs/docsrs.service.js

@@ -54,7 +54,7 @@ export default class DocsRs extends BaseJsonService {
  async handle({ crate, version = 'latest' }) {
  const { build_status: buildStatus } = (
  await this.fetch({ crate, version })
- ).pop()
+ ).shift()
  return this.constructor.render({ version, buildStatus })
  }
 }

services/docsrs/docsrs.tester.js

@@ -10,6 +10,10 @@ t.create('Failing docs')
  .get('/tensorflow/0.16.1.json')
  .expectBadge({ label: '[email protected]', message: 'failing' })
 
+t.create('Multiple builds, latest passing')
+ .get('/bevy_tweening/0.3.1.json')
+ .expectBadge({ label: '[email protected]', message: 'passing' })
+
 t.create('Getting latest version works')
  .get('/rand/latest.json')
  .expectBadge({