ux(docs): provide a release changelog

Also set up a documented release process.

Fixes #670.

.versionrc.json

@@ -0,0 +1,20 @@
+{
+  "types": [
+    {
+      "type": "auto",
+      "section": "Internal changes"
+    },
+    {
+      "type": "dx",
+      "section": "Internal changes"
+    },
+    {
+      "type": "ux",
+      "section": "User facing changes"
+    }
+  ],
+  "releaseCommitMessageFormat": "release(package): {{currentTag}}",
+  "skip": {
+    "tag": true
+  }
+}

CONTRIBUTING.md

@@ -0,0 +1,32 @@
+# Contributing
+
+## Making a release
+
+Make sure you have permission to publish, by running
+
+    npm access ls-collaborators
+
+While on the `master` branch, switch to a new branch, possibly called `release`:
+
+    git switch --create release
+    npm run make-release-commit
+
+Create a new pull request from this branch. The name of the pull request possibly identical to the commit message.
+
+"Rebase and merge" the pull request.
+
+    git switch master
+    git pull
+
+Where `$VERSION` is the new version, run
+
+    git tag v$VERSION
+
+For example:
+
+    git tag v5.2.4
+
+And then
+
+    git push --tags
+    npm publish

commitlint.config.json

@@ -16,8 +16,9 @@
     "type-empty": [2, "never"],
     "type-enum": [2, "always", [
       "auto",
-      "ux",
-      "dx"
+      "dx",
+      "release",
+      "ux"
     ]],
     "scope-empty": [2, "never"],
     "scope-enum": [2, "always", [