docs: parser options

README.md

@@ -313,6 +313,25 @@ If you do not want to have any tag prefix you can use the `-t` flag and provide
 
 > Note: simply -t or --tag-prefix without any value will fallback to the default 'v'
 
+### Parser Options
+
+If you need to include custom parser options to read your commits, you can use the `--parser-opts` to indicate the path to a .js file that exports the options.
+
+```sh
+standard-version --parser-options ./parser-opts.js
+```
+
+This can be useful in cases like Azure DevOps that uses custom merge pull request titles. The `parser-opts.js` could look like this:
+
+```js
+module.exports = {
+    mergePattern: /^Merged PR (\d+): (\w*)(?:\(([\w\$\.\-\* ]*)\))?\: (.*)$/,
+    mergeCorrespondence: ['id', 'type', 'scope', 'subject']
+}
+```
+
+For more informantion on what parser options are available, reference to [documentation](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-commits-parser).
+
 ### CLI Help
 
 ```sh