docs(AuthorReviews): Wrote documentation for AuthorReviews component

packages/component-faraday-ui/src/contextualBoxes/AuthorReviews.js

 import React from 'react'
+import PropTypes from 'prop-types'
 import { withProps, compose } from 'recompose'
 
 import { ContextualBox, ReviewerReportAuthor, Row, Text } from '../'
@@ -15,14 +16,7 @@ const SubmittedReportsNumberForAuthorReviews = ({ reports }) => (
   </Row>
 )
 
-const AuthorReviews = ({
-  invitations,
-  journal,
-  reports,
-  fragment,
-  token,
-  getSignedUrl,
-}) =>
+const AuthorReviews = ({ journal, reports, token, getSignedUrl }) =>
   reports.length > 0 && (
     <ContextualBox
       label="Reviewer Reports"
@@ -43,4 +37,22 @@ const AuthorReviews = ({
     </ContextualBox>
   )
 
+AuthorReviews.propTypes = {
+  /** The list of available reports. */
+  reports: PropTypes.arrayOf(PropTypes.object),
+  /** Returns the url of the selected file. */
+  getSignedUrl: PropTypes.func,
+  /** Object containing the list of recommendations. */
+  journal: PropTypes.object, //eslint-disable-line
+  /** Contains the token of the currently logged user */
+  token: PropTypes.string,
+}
+
+AuthorReviews.defaultProps = {
+  reports: [],
+  getSignedUrl: undefined,
+  journal: {},
+  token: '',
+}
+
 export default compose(withProps())(AuthorReviews)