refactor: optimize imports

src/components/nav.js

@@ -1,8 +1,7 @@
 import React from "react";
 import { Link } from "gatsby";
 import styled from "@emotion/styled";
-import NavItem from "./nav-item";
-import MenuButton from "./menu-button";
+import { MenuButton, NavItem } from ".";
 import LogoArrows from "../icons/logo-arrows.svg";
 
 const Container = styled.div`

src/components/review-summary.js

@@ -1,6 +1,6 @@
 import React from "react";
 import styled from "@emotion/styled";
-import Text from "./text";
+import { Text } from ".";
 import RatedPeople from "../icons/rated-people.svg";
 import Bark from "../icons/bark.svg";
 import QuoteLeft from "../icons/quote-left.svg";