Fix the linter errors on CI

lib/agenda/cancel.js

@@ -11,6 +11,7 @@ const debug = require('debug')('agenda:cancel');
  */
 module.exports = function(query) {
   debug('attempting to cancel all Agenda jobs', query);
+  // eslint-disable-next-line promise/prefer-await-to-then
   return this._collection.deleteMany(query).then(({result}) => {
     debug('%s jobs cancelled', result.n);
     return result.n;

lib/agenda/save-job.js

@@ -5,10 +5,10 @@ const {processJobs} = require('../utils');
 /**
  * Given a result for findOneAndUpdate() or insert() above, determine whether to process
  * the job immediately or to let the processJobs() interval pick it up later
- * @param {Error} err error passed in via MongoDB call as to whether modify call failed or passed
+ * @param {Job} job a job to process
  * @param {*} result the data returned from the findOneAndUpdate() call or insertOne() call
  * @access private
- * @returns {undefined}
+ * @returns {Job} the job that was passed in
  */
 const processDbResult = (job, result) => {
   debug('processDbResult() called with success, checking whether to process job immediately or not');

lib/agenda/start.js

@@ -7,7 +7,7 @@ const {processJobs} = require('../utils');
  * This method will only resolve if a db has been set up beforehand.
  * @name Agenda#start
  * @function
- * @returns {Promise}
+ * @returns {Promise} a promise with undefined
  */
 module.exports = async function() {
   if (this._processInterval) {

lib/utils/process-jobs.js

@@ -287,6 +287,7 @@ module.exports = function(extraJob) {
           debug('[%s:%s] processing job', job.attrs.name, job.attrs._id);
           job.run()
             .catch(err => [err, job])
+            // eslint-disable-next-line promise/prefer-await-to-then
             .then(job => processJobResult(...Array.isArray(job) ? job : [null, job]));
 
           // Re-run the loop to check for more jobs to process (locally)

test/job.js

@@ -1,3 +1,4 @@
+/* eslint promise/prefer-await-to-then: 0 */
 /* globals describe, it, beforeEach, afterEach */
 'use strict';
 const path = require('path');