Fixed: Upgrade elm-format to newer version

Installing the dependencies for this package would fail on a newer M1 Mac. (Running `npm install`) This is because elm-format did not have a binary version available for this platform.

This PR updates the package.json and package-lock.json files to install the latest version of elm-format.

Author: ahankinson

package-lock.json

@@ -2,7 +2,7 @@
   "dependencies": {
     "elm": "0.19.1-5",
     "elm-doc-preview": "^5.0.5",
-    "elm-format": "^0.8.2",
+    "elm-format": "^0.8.7",
     "elm-review": "^2.10.2",
     "elm-test": "0.19.1-revision12",
     "elm-verify-examples": "^5.2.0",