fix: remove stray {...object}

[billiegoose]

For some reason, Object spread properties are still causing trouble, particularly with https://bundlephobia.com/. Therefore, I'm changing the one object spread property to an Object.assign.

[isomorphic-git-bot]

Thank you wmhilton! I noticed some potential linting errors, so I auto-formatted the code using prettier-standard. I hope you don't mind. 🤖

[karma-pr-reporter]

Test Results for 45e2940:

Browser	Passed	Skipped	Failed	Time	Disconnected	Error
HeadlessChrome 0.0.0 (Linux 0.0.0)	220	1	0	57.837 secs	false	undefined
Firefox 62.0.0 (Ubuntu 0.0.0)	220	1	0	1 min 29.626 secs	false	undefined
Safari 12.0.0 (Mac OS X 10.13.6)	220	1	0	2 mins 26.333 secs	false	undefined
Chrome Mobile 67.0.3396 (Android 7.1.1)	220	1	0	4 mins 55.501 secs	false	undefined
Edge 17.17134.0 (Windows 10 0.0.0)	220	1	0	5 mins 29.618 secs	false	undefined
Mobile Safari 11.0.0 (iOS 11.2.0)	220	1	0	6 mins 50.875 secs	false	undefined

[karma-pr-reporter]

Test Results for 22fd6bb:

Browser	Passed	Skipped	Failed	Time	Disconnected	Error
HeadlessChrome 0.0.0 (Linux 0.0.0)	220	1	0	55.033 secs	false	undefined
Firefox 62.0.0 (Ubuntu 0.0.0)	220	1	0	1 min 31.776 secs	false	undefined
Mobile Safari 11.0.0 (iOS 11.2.0)	220	1	0	5 mins 7.113 secs	false	undefined
Edge 17.17134.0 (Windows 10 0.0.0)	220	1	0	5 mins 20.013 secs	false	undefined
Safari 12.0.0 (Mac OS X 10.13.6)	220	1	0	5 mins 41.952 secs	false	undefined
Chrome Mobile 67.0.3396 (Android 7.1.1)	220	1	0	6 mins 25.384 secs	false	undefined

[isomorphic-git-bot]

🎉 This PR is included in version 0.39.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀