more fine-tuning of the commit analyzer

With  a small modification to the regular expression that matches the
commit message header we should
be able to force the first word to be
captured as the type.

.releaserc

@@ -3,6 +3,7 @@
   "plugins": [
     ["@semantic-release/commit-analyzer", {
       "preset": "conventionalcommits",
+      "parserOpts": "./commit-parser-options.js",
       "releaseRules": [
         { "type": "!(fix|feat|build|chore|ci|docs|style|refactor|perf|test)", "release": "patch" }
       ]

commit-parser-options.js

@@ -0,0 +1,7 @@
+// Change default header pattern matcher to match headers with no colon.
+// This will make the first __word__ in free-form commit message headers the __type__.
+// With this non-empty type we can do a negated match (the type being anything but
+// one of the other keywords with associated release rules).
+module.exports = {
+    "headerPattern": /^(\w*)(?:\(([\w\$\.\-\* ]*)\))?\:? (.*)$/
+};