Removed use of native JS Error objects

refs https://linear.app/tryghost/issue/CORE-49/fix-errors-in-utils-repo-limit-service

- The latest ESLint rules forbid use of native JS errors, updated the codebase before bumping the ESLint version

ghost/limit-service/lib/date-utils.js

@@ -1,4 +1,5 @@
 const {DateTime} = require('luxon');
+const {IncorrectUsageError} = require('@tryghost/errors');
 
 const SUPPORTED_INTERVALS = ['month'];
 /**
@@ -21,7 +22,7 @@ const lastPeriodStart = (startDate, interval) => {
         return lastPeriodStartDate.toISO();
     }
 
-    throw new Error('Invalid interval specified. Only "month" value is accepted.');
+    throw new IncorrectUsageError('Invalid interval specified. Only "month" value is accepted.');
 };
 
 module.exports = {

ghost/limit-service/lib/limit-service.js

@@ -1,5 +1,6 @@
 const {MaxLimit, MaxPeriodicLimit, FlagLimit, AllowlistLimit} = require('./limit');
 const config = require('./config');
+const {IncorrectUsageError} = require('@tryghost/errors');
 const _ = require('lodash');
 
 class LimitService {
@@ -19,7 +20,7 @@ class LimitService {
      */
     loadLimits({limits = {}, subscription, helpLink, db, errors}) {
         if (!errors) {
-            throw new Error(`Config Missing: 'errors' is required.`);
+            throw new IncorrectUsageError(`Config Missing: 'errors' is required.`);
         }
 
         this.errors = errors;

ghost/limit-service/package.json

@@ -26,6 +26,7 @@
     "sinon": "11.0.0"
   },
   "dependencies": {
+    "@tryghost/errors": "^0.2.13",
     "lodash": "^4.17.21",
     "luxon": "^1.26.0"
   }