Upgrade react-router-dom to v5.3

app/soapbox/features/groups/edit/index.js

@@ -4,6 +4,7 @@ import React from 'react';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import { defineMessages, injectIntl } from 'react-intl';
 import { connect } from 'react-redux';
+import { withRouter } from 'react-router-dom';
 
 import MissingIndicator from 'soapbox/components/missing_indicator';
 
@@ -37,12 +38,9 @@ const mapDispatchToProps = dispatch => ({
 
 export default @connect(mapStateToProps, mapDispatchToProps)
 @injectIntl
+@withRouter
 class Edit extends React.PureComponent {
 
-  static contextTypes = {
-    router: PropTypes.object,
-  }
-
   static propTypes = {
     group: ImmutablePropTypes.map,
     title: PropTypes.string.isRequired,
@@ -55,6 +53,7 @@ class Edit extends React.PureComponent {
     onDescriptionChange: PropTypes.func.isRequired,
     onCoverImageChange: PropTypes.func.isRequired,
     setUp: PropTypes.func.isRequired,
+    history: PropTypes.object,
   };
 
   constructor(props) {
@@ -82,11 +81,11 @@ class Edit extends React.PureComponent {
 
   handleSubmit = e => {
     e.preventDefault();
-    this.props.onSubmit(this.context.router.history);
+    this.props.onSubmit(this.props.history);
   }
 
   handleClick = () => {
-    this.props.onSubmit(this.context.router.history);
+    this.props.onSubmit(this.props.history);
   }
 
   render() {