refactor devcontainer configuration for cleaner formatting

Author: chrisreddington

.devcontainer/devcontainer.json

@@ -4,9 +4,7 @@
   "postCreateCommand": "npm install",
   "customizations": {
     "codespaces": {
-      "openFiles": [
-        "README.md"
-      ]
+      "openFiles": ["README.md"]
     },
     "vscode": {
       "extensions": [
@@ -49,4 +47,4 @@
     "test": "npm run ci-test",
     "run": "npm run all"
   }
-}
+}