Feature/grs 1955 change commonjs imports (#1995)

* GRS-1955: Using ES6 import/export in src files

* GRS-1955: Using ES6 import/export in test files

* GRS-1955: Using ES6 import/export in themes index.js

* GRS-1955: Readding blank line at end of top-languages-card.js

* feat: fix test es6 import errors

This commit makes sure jest is set-up to support es6. It also fixes
several test errors and sorts the imports.

* test: update test node version

This commit makes sure node 16 is used in the github actions.

* refactor: run prettier

Co-authored-by: rickstaa <rick.staa@outlook.com>

src/fetchers/repo-fetcher.js

@@ -1,6 +1,6 @@
 // @ts-check
-const retryer = require("../common/retryer");
-const { request, MissingParamError } = require("../common/utils");
+import { retryer } from "../common/retryer";
+import { MissingParamError, request } from "../common/utils";
 
 /**
  * @param {import('Axios').AxiosRequestHeaders} variables
@@ -97,4 +97,5 @@ async function fetchRepo(username, reponame) {
   }
 }
 
-module.exports = fetchRepo;
+export { fetchRepo };
+export default fetchRepo;

src/fetchers/stats-fetcher.js

@@ -1,17 +1,17 @@
 // @ts-check
-const axios = require("axios").default;
-const githubUsernameRegex = require("github-username-regex");
-
-const retryer = require("../common/retryer");
-const calculateRank = require("../calculateRank");
-const {
-  request,
-  logger,
+import axios from "axios";
+import * as dotenv from "dotenv";
+import githubUsernameRegex from "github-username-regex";
+import { calculateRank } from "../calculateRank";
+import { retryer } from "../common/retryer";
+import {
   CustomError,
+  logger,
   MissingParamError,
-} = require("../common/utils");
+  request,
+} from "../common/utils";
 
-require("dotenv").config();
+dotenv.config();
 
 /**
  * @param {import('axios').AxiosRequestHeaders} variables
@@ -187,4 +187,5 @@ async function fetchStats(
   return stats;
 }
 
-module.exports = fetchStats;
+export { fetchStats };
+export default fetchStats;

src/fetchers/top-languages-fetcher.js

@@ -1,7 +1,9 @@
 // @ts-check
-const { request, logger, MissingParamError } = require("../common/utils");
-const retryer = require("../common/retryer");
-require("dotenv").config();
+import * as dotenv from "dotenv";
+import { retryer } from "../common/retryer";
+import { logger, MissingParamError, request } from "../common/utils";
+
+dotenv.config();
 
 /**
  * @param {import('Axios').AxiosRequestHeaders} variables
@@ -104,4 +106,5 @@ async function fetchTopLanguages(username, exclude_repo = []) {
   return topLangs;
 }
 
-module.exports = fetchTopLanguages;
+export { fetchTopLanguages };
+export default fetchTopLanguages;

src/fetchers/wakatime-fetcher.js

@@ -1,5 +1,5 @@
-const axios = require("axios");
-const { MissingParamError } = require("../common/utils");
+import axios from "axios";
+import { MissingParamError } from "../common/utils";
 
 /**
  * @param {{username: string, api_domain: string, range: string}} props
@@ -26,6 +26,5 @@ const fetchWakatimeStats = async ({ username, api_domain, range }) => {
   }
 };
 
-module.exports = {
-  fetchWakatimeStats,
-};
+export { fetchWakatimeStats };
+export default fetchWakatimeStats;