upgrade dev dependencies to latest

Author: Cache Hamm

package.json

@@ -45,24 +45,24 @@
   "homepage": "https://github.com/cachecontrol/json-rules-engine",
   "devDependencies": {
     "babel-cli": "^6.4.5",
-    "babel-core": "~6.9.1",
+    "babel-core": "~6.24.1",
     "babel-eslint": "^7.1.1",
-    "babel-loader": "~6.2.4",
+    "babel-loader": "~6.4.1",
     "babel-plugin-transform-async-to-generator": "^6.4.6",
-    "babel-polyfill": "~6.7.4",
-    "babel-preset-es2015": "~6.9.0",
-    "babel-preset-stage-0": "~6.5.0",
+    "babel-polyfill": "~6.23.0",
+    "babel-preset-es2015": "~6.24.1",
+    "babel-preset-stage-0": "~6.24.1",
     "babel-register": "^6.4.3",
     "chai": "^3.5.0",
     "chai-as-promised": "^6.0.0",
     "colors": "~1.1.2",
     "dirty-chai": "1.2.2",
     "mocha": "^3.2.0",
-    "regenerator": "~0.8.46",
-    "sinon": "^1.17.2",
+    "regenerator": "~0.9.7",
+    "sinon": "^2.1.0",
     "sinon-chai": "^2.8.0",
-    "snazzy": "^2.0.1",
-    "standard": "^9.0.0"
+    "snazzy": "^7.0.0",
+    "standard": "^10.0.1"
   },
   "dependencies": {
     "debug": "~2.6.3",

src/almanac.js

@@ -1,14 +1,14 @@
 'use strict'
 
+import Fact from './fact'
+import { UndefinedFactError } from './errors'
+
 let debug = require('debug')('json-rules-engine')
 let verbose = require('debug')('json-rules-engine-verbose')
 let selectn = require('selectn')
 let isPlainObject = require('lodash.isplainobject')
 let warn = require('debug')('json-rules-engine:warn')
 
-import Fact from './fact'
-import { UndefinedFactError } from './errors'
-
 /**
  * Fact results lookup
  * Triggers fact computations and saves the results

test/engine-cache.test.js

@@ -1,7 +1,7 @@
 'use strict'
 
-import engineFactory from '../src/index'
 import sinon from 'sinon'
+import engineFactory from '../src/index'
 
 describe('Engine: cache', () => {
   let engine
@@ -16,8 +16,12 @@ describe('Engine: cache', () => {
     }]
   }
 
-  let factSpy = sinon.stub().returns(22)
+  let factSpy = sinon.spy()
   let eventSpy = sinon.spy()
+  let ageFact = () => {
+    factSpy()
+    return 22
+  }
   function setup (factOptions) {
     factSpy.reset()
     eventSpy.reset()
@@ -28,7 +32,7 @@ describe('Engine: cache', () => {
     engine.addRule(determineCollegeSenior)
     let over20 = factories.rule({ conditions, event: collegeSeniorEvent, priority: 50 })
     engine.addRule(over20)
-    engine.addFact('age', factSpy, factOptions)
+    engine.addFact('age', ageFact, factOptions)
     engine.on('success', eventSpy)
   }