chore: Update syntax, improve more typing (#1439)

* chore: <React.Fragment> to <>

* flow types

app/scenes/GroupMembers/GroupMembers.js

@@ -62,7 +62,7 @@ class GroupMembers extends React.Component<Props> {
     return (
       <Flex column>
         {can.update ? (
-          <React.Fragment>
+          <>
             <HelpText>
               Add and remove team members in the <strong>{group.name}</strong>{" "}
               group. Adding people to the group will give them access to any
@@ -78,7 +78,7 @@ class GroupMembers extends React.Component<Props> {
                 Add people…
               </Button>
             </span>
-          </React.Fragment>
+          </>
         ) : (
           <HelpText>
             Listing team members in the <strong>{group.name}</strong> group.

app/scenes/GroupMembers/components/GroupMemberListItem.js

@@ -27,17 +27,17 @@ const GroupMemberListItem = ({
     <ListItem
       title={user.name}
       subtitle={
-        <React.Fragment>
+        <>
           {user.lastActiveAt ? (
-            <React.Fragment>
+            <>
               Active <Time dateTime={user.lastActiveAt} /> ago
-            </React.Fragment>
+            </>
           ) : (
             "Never signed in"
           )}
           {!user.lastActiveAt && <Badge>Invited</Badge>}
           {user.isAdmin && <Badge primary={user.isAdmin}>Admin</Badge>}
-        </React.Fragment>
+        </>
       }
       image={<Avatar src={user.avatarUrl} size={40} />}
       actions={

app/scenes/GroupMembers/components/UserListItem.js

@@ -20,17 +20,17 @@ const UserListItem = ({ user, onAdd, canEdit }: Props) => {
       title={user.name}
       image={<Avatar src={user.avatarUrl} size={32} />}
       subtitle={
-        <React.Fragment>
+        <>
           {user.lastActiveAt ? (
-            <React.Fragment>
+            <>
               Active <Time dateTime={user.lastActiveAt} /> ago
-            </React.Fragment>
+            </>
           ) : (
             "Never signed in"
           )}
           {!user.lastActiveAt && <Badge>Invited</Badge>}
           {user.isAdmin && <Badge primary={user.isAdmin}>Admin</Badge>}
-        </React.Fragment>
+        </>
       }
       actions={
         canEdit ? (