Update docs

README.md

@@ -6,7 +6,7 @@ This plugin will provide the recommended bump to release-it, and update the chan
 npm install --save-dev @release-it/conventional-changelog
 ```
 
-## Config
+## Configuration
 
 In the [release-it](https://github.com/release-it/release-it) config, for example:
 
@@ -19,7 +19,26 @@ In the [release-it](https://github.com/release-it/release-it) config, for exampl
 }
 ```
 
-...or another example:
+Options are passed verbatim to
+[conventional-recommended-bump](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-recommended-bump#readme)
+and
+[conventional-changelog](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog#readme).
+
+### `preset`
+
+Use one of:
+
+- `angular`
+- `atom`
+- `codemirror`
+- `ember`
+- `eslint`
+- `express`
+- `jquery`
+- `jscs`
+- `jshint`
+
+Use an object with `name` and `types` to use a custom preset, such as conventional commits:
 
 ```json
 "plugins": {
@@ -43,14 +62,23 @@ In the [release-it](https://github.com/release-it/release-it) config, for exampl
 }
 ```
 
-- Omit the `infile` at will. If set, but the file does not exist yet, it's created with the full history.
-- Please find the
-  [list of available presets](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages)
-  (`angular`, `ember`, etc).
-- Options are passed verbatim to
-  [conventional-recommended-bump](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-recommended-bump#readme)
-  and
-  [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog#readme).
+### `infile`
+
+Default value: `undefined`
+
+- Set a filename as `infile` to write the changelog to. If this file does not exist yet, it's created with the full
+  history.
+- When `infile` is not set, the changelog generated by this plugin will still be used as release notes for e.g.
+  [GitHub Releases](https://github.com/release-it/release-it/blob/master/docs/github-releases.md).
+
+### `ignoreRecommendedBump`
+
+Default value: `false`
+
+Use `true` to ignore the recommended bump, and use the version provided by release-it (command line argument or prompt).
+
+(Note that the changelog preview shows the recommended bump, as the desired version isn't known yet. The `infile` will
+have the correct version.)
 
 ## GitHub Actions