message: docs: update `jest-changed-files` Readme
diff: @@ -10,7 +10,7 @@ $ npm install --save jest-changed-files
  ## API
  -### `getChangedFilesForRoots(roots: <Array<string>>, options: ?object): Promise<?object>`
  +### `getChangedFilesForRoots(roots: Array<string>, options: Options): Promise<ChangedFiles>`
  Get the list of files and repos that have changed since the last commit.
  @@ -22,8 +22,18 @@ options: Object literal with keys
  - lastCommit: boolean
  - withAncestor: boolean
  +- changedSince: string
  -### findRepos(roots: <Array<string>>): Promise<?object>
  +### Returns
  +
  +A Promise of Object literal with keys
  +
  +- changedFiles: Set\<string>
  +- repos:
  + - git: Set\<string>
  + - hg: Set\<string>
  +
  +### findRepos(roots: Array<string>): Promise<Repos>
  Get a set of git and hg repositories.
  @@ -31,6 +41,13 @@ Get a set of git and hg repositories.
  roots: Array of string paths gathered from [jest roots](https://jestjs.io/docs/configuration#roots-arraystring).
  +### Returns
  +
  +A Promise of Object literal with keys
  +
  +- git: Set\<string>
  +- hg: Set\<string>
  +
  ## Usage
  ```javascript
  @@ -49,6 +66,21 @@ getChangedFilesForRoots(['/path/to/test'], {
  });
  ```
  +```javascript
  +import {getChangedFilesForRoots} from 'jest-changed-files';
  +
  +getChangedFilesForRoots(['/path/to/test'], {
  + changedSince: 'main',
  +}).then(files => {
  + /*
  + {
  + repos: [],
  + changedFiles: []
  + }
  + */
  +});
  +```
  +
  ```javascript
  import {findRepos} from 'jest-changed-files';
  