fix lint (DavideViolante#121)

functions.js

@@ -14,5 +14,5 @@ const mapResponse = (array = []) => array.map((item) => ({
 }));
 
 module.exports = {
-  mapResponse
+  mapResponse,
 };

index.js

@@ -38,20 +38,20 @@ function checkParams(input, period, interval, pointscount) {
  * @return {Promise<Array>} An array of arrays with date (timestamp) and values (number) properties
  */
 async function callInvesting(pairId, period, interval, pointscount) {
-  const url = `https://api.investing.com/api/financialdata/${pairId}/historical/chart?period=${period}&interval=${interval}&pointscount=${pointscount}`
+  const url = `https://api.investing.com/api/financialdata/${pairId}/historical/chart?period=${period}&interval=${interval}&pointscount=${pointscount}`;
 
   const response = await fetch(url, {
     headers: new Headers({
-      "upgrade-insecure-requests": "1"
-    })
+      'upgrade-insecure-requests': '1',
+    }),
   });
 
   if (!response.ok) {
     throw new Error(`Response status: ${response.status}`);
   }
 
   const json = await response.json();
-  return json.data
+  return json.data;
 }
 
 /**

test/test.js

@@ -11,7 +11,6 @@ const mockData = [
 ];
 
 describe('Tests for Investing.com unofficial APIs', () => {
-
   it('should map an array of arrays to array of objects', () => {
     const mappedResponse = mapResponse(mockData);
     const expected = [
@@ -80,5 +79,4 @@ describe('Tests for Investing.com unofficial APIs', () => {
     const response = await investing('currencies/eur-usd', 'P1M', 'P1D', 20);
     assert.strictEqual(response, undefined);
   });
-
 });