Update linter

package.json

@@ -22,20 +22,19 @@
     "@babel/preset-env": "^7.14.7"
   },
   "devDependencies": {
-    "@babel/cli": "7.14.3",
-    "@babel/core": "7.14.3",
+    "@babel/cli": "7.14.5",
+    "@babel/core": "7.14.6",
     "@babel/eslint-parser": "7.14.7",
-    "@babel/plugin-proposal-nullish-coalescing-operator": "7.14.2",
-    "@babel/plugin-proposal-optional-chaining": "7.14.2",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "7.14.5",
+    "@babel/plugin-proposal-optional-chaining": "7.14.5",
     "chai": "^4.2.0",
-    "eslint": "^4.0.0",
+    "eslint": "^7.29.0",
     "eslint-config-prettier": "^8.3.0",
-    "eslint-config-standard": "^11.0.0",
+    "eslint-config-standard": "^16.0.3",
     "eslint-plugin-import": "^2.8.0",
-    "eslint-plugin-node": "^7.0.1",
-    "eslint-plugin-promise": "^4.0.0",
-    "eslint-plugin-standard": "^3.0.0",
+    "eslint-plugin-node": "^11.1.0",
+    "eslint-plugin-promise": "^5.1.0",
     "mocha": "^5.2.0",
-    "prettier": "^2.3.1"
+    "prettier": "^2.3.2"
   }
 }

src/currency/index.js

@@ -1,12 +1,12 @@
 const dollarPrefixes = {
-  'AUD': 'A',
-  'CAD': 'CA',
-  'HKD': 'HK',
-  'MOP': 'MOP',
-  'NZD': 'NZ',
-  'SGD': 'S',
-  'TWD': 'NT',
-  'USD': 'US',
+  AUD: 'A',
+  CAD: 'CA',
+  HKD: 'HK',
+  MOP: 'MOP',
+  NZD: 'NZ',
+  SGD: 'S',
+  TWD: 'NT',
+  USD: 'US',
 }
 
 function addDollarType(formattedAmount, currencyCode) {

src/flights/index.js

@@ -23,11 +23,11 @@ const ALLOWED_DESTINATIONS = [
 ]
 
 const ALLOWED_DESTINATION_CODES = ALLOWED_DESTINATIONS.map(
-  destination => destination.code
+  destination => destination.code,
 )
 
 const ALLOWED_DESTINATION_NAMES = ALLOWED_DESTINATIONS.map(
-  destination => destination.name
+  destination => destination.name,
 )
 
 module.exports = {

src/offer/duration.js

@@ -36,7 +36,7 @@ const getCountsString = (packages, field) => {
 }
 
 const getFromPackages = (packages, offerType, holidayTypes) => {
-  let dayOrNightsData = dayOrNights[offerType]
+  const dayOrNightsData = dayOrNights[offerType]
 
   if (holidayTypes) {
     // Block for holidayTypes

src/offer/flexiNights.js

@@ -19,7 +19,7 @@ function calculatePackagePrices(offerPackagePrices, extraNights = 0) {
 }
 
 /**
- * Generates a single option for combination of package/package option/extra nights given 
+ * Generates a single option for combination of package/package option/extra nights given
  *
  * @param {*} offerPackage a package of an offer
  * @param {*} packageOption a package option of a package in an offer, optional
@@ -39,7 +39,7 @@ function generateOption(offerPackage, packageOption, extraNights = 0) {
 }
 
 /**
- * Generates a list of all the options a user can purchase for a package, 
+ * Generates a list of all the options a user can purchase for a package,
  * including all options available from the flexible nights configuration
  *
  * @param {*} pkg a package of an offer
@@ -48,7 +48,7 @@ function generateOption(offerPackage, packageOption, extraNights = 0) {
 function generateAllOptions(pkg) {
   const extraNightsCount = (pkg.flexible_nights && pkg.max_extra_nights) || 0
   // package options are optionally setup, so fallback to base package if no options
-  const packageOptions = !!pkg.package_options?.length ? pkg.package_options : [{ fk_room_rate_id: pkg.fk_room_rate_id }]
+  const packageOptions = pkg.package_options?.length ? pkg.package_options : [{ fk_room_rate_id: pkg.fk_room_rate_id }]
 
   return packageOptions.flatMap(packageOption => {
     return [