Reformat config files

This runs the configlet fmt command, which normalizes the
contents and ordering of keys in the track config and
maintainers config.

This will let us script changes to the config files without
having unnecessary noise in the diffs when submitting pull
requests.

config/maintainers.json

   "docs_url": "https://github.com/exercism/docs/blob/master/maintaining-a-track/maintainer-configuration.md",
   "maintainers": [
     {
-      "alumnus": true,
-      "avatar_url": null,
-      "bio": null,
       "github_username": "jtigger",
+      "alumnus": true,
+      "show_on_website": false,
+      "name": null,
       "link_text": null,
       "link_url": null,
-      "name": null,
-      "show_on_website": false
+      "avatar_url": null,
+      "bio": null
     },
     {
-      "alumnus": true,
-      "avatar_url": null,
-      "bio": null,
       "github_username": "matthewmorgan",
+      "alumnus": true,
+      "show_on_website": false,
+      "name": null,
       "link_text": null,
       "link_url": null,
-      "name": null,
-      "show_on_website": false
+      "avatar_url": null,
+      "bio": null
     },
     {
-      "alumnus": false,
-      "avatar_url": null,
-      "bio": null,
       "github_username": "sit",
+      "alumnus": false,
+      "show_on_website": false,
+      "name": null,
       "link_text": null,
       "link_url": null,
-      "name": null,
-      "show_on_website": false
+      "avatar_url": null,
+      "bio": null
     },
     {
-      "alumnus": true,
-      "avatar_url": null,
-      "bio": null,
       "github_username": "stkent",
+      "alumnus": true,
+      "show_on_website": false,
+      "name": null,
       "link_text": null,
       "link_url": null,
-      "name": null,
-      "show_on_website": false
+      "avatar_url": null,
+      "bio": null
     },
     {
-      "alumnus": false,
-      "bio": "I'm a 16 year old high school student. I like programming and java a lot. Contributing to exercism helps me to keep learning and get valuable experience. One day near, I hope to have a job or internship programming",
       "github_username": "Smarticles101",
-      "show_on_website": true
+      "alumnus": false,
+      "show_on_website": true,
+      "name": null,
+      "link_text": null,
+      "link_url": null,
+      "avatar_url": null,
+      "bio": "I'm a 16 year old high school student. I like programming and java a lot. Contributing to exercism helps me to keep learning and get valuable experience. One day near, I hope to have a job or internship programming"
     },
     {
-      "alumnus": false,
-      "bio": "I'm a software developer working for Softwire, a UK based software company. I love programming in pretty much any language (possibly with the exception of C++) but Java is probably the language I have the most experience with.",
       "github_username": "FridaTveit",
+      "alumnus": false,
+      "show_on_website": true,
       "name": "Frida Johanne Tveit",
-      "show_on_website": true
+      "link_text": null,
+      "link_url": null,
+      "avatar_url": null,
+      "bio": "I'm a software developer working for Softwire, a UK based software company. I love programming in pretty much any language (possibly with the exception of C++) but Java is probably the language I have the most experience with."
     },
     {
-      "alumnus": false,
-      "bio": "I am a software developer and consultant working for Black Pepper Software, a software company based in Leamington Spa, England. I'm a recent Computer Science graduate from the University of Warwick, and love all things to do with computers!",
       "github_username": "sjwarner-bp",
+      "alumnus": false,
+      "show_on_website": true,
       "name": "Sam Warner",
-      "show_on_website": true
+      "link_text": null,
+      "link_url": null,
+      "avatar_url": null,
+      "bio": "I am a software developer and consultant working for Black Pepper Software, a software company based in Leamington Spa, England. I'm a recent Computer Science graduate from the University of Warwick, and love all things to do with computers!"
     }
   ]
 }