fix: resolve "treeNotSorted: not properly sorted" git fsck error

[billiegoose]

It turns out the proper sort order of config, config0, and config.txt in a Git Tree if config is a directory is:

• config.txt
• config
• config0

because git adds a virtual trailing slash to directory names, and in ASCII ordering . comes before / comes before 0.

I'm fixing a bug or typo

• if this is your first time contributing, run npm run add-contributor and follow the prompts to add yourself to the README
• squash merge the PR with commit message "fix: [Description of fix]"

[isomorphic-git-bot]

Thank you wmhilton! I auto-formatted the code using prettier-standard. 🤖

[karma-pr-reporter]

Test Results for 9292df8:

Browser	Pass	Skip	Fail	Time	Disconnect?
Chrome Mobile 69.0.3497 (Android 7.1.1)	326	1	0	2m:13s	false
Edge 17.17134.0 (Windows 10 0.0.0)	326	1	0	3m:45s	false
Firefox 70.0.0 (Ubuntu 0.0.0)	326	1	0	1m:41s	false
HeadlessChrome 0.0.0 (Linux 0.0.0)	326	1	0	0m:48s	false
Mobile Safari 11.0.0 (iOS 11.2.0)	325	2	0	2m:14s	false
Safari 11.1.2 (Mac OS X 10.13.6)	326	1	0	3m:24s	false

Longest running tests

• 25.99 secs - fetch fetch --prune-tags from git-http-mock-server - Safari
• 23.672 secs - fetch fetch (from Github) - Edge
• 16.645 secs - GitPackIndex to .idx file from .pack - Edge
• 15.55 secs - fetch fetch --prune-tags from git-http-mock-server - Firefox
• 15.047 secs - GitPackIndex from .pack - Edge
• 13.999 secs - fetch shallow fetch (from Github) - Firefox
• 10.935 secs - fetch shallow fetch (from Github) - Edge
• 10.558 secs - GitPackIndex to .idx file from .pack - Firefox
• 10.36 secs - fetch shallow fetch exclude (from Github) - Edge
• 10.259 secs - fetch shallow fetch since (from Github) - Edge
• 10.038 secs - GitPackIndex from .pack - Firefox

[isomorphic-git-bot]

🎉 This PR is included in version 1.0.0-beta.3 🎉

The release is available on:

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

Your semantic-release bot 📦🚀