test: fix the test script on Windows

Author: aminya

package.json

@@ -16,7 +16,7 @@
     "build": "cross-env NODE_ENV=production parcel build --target main lib/main.js",
     "build-commit": "npm run clean && build-commit -o dist",
     "esdoc": "esdoc -c esdoc.json",
-    "test": "cross-env NODE_ENV=test atom --test spec",
+    "test": "atom --test spec",
     "bump": "ncu -u",
     "prepare": "npm run build"
   },

spec/canvas-layer-spec.js

@@ -1,4 +1,5 @@
 'use strict'
+process.env.NODE_ENV = 'test'
 
 const CanvasLayer = require('../lib/canvas-layer')
 

spec/minimap-element-spec.js

@@ -1,4 +1,5 @@
 'use strict'
+process.env.NODE_ENV = 'test'
 
 const fs = require('fs-plus')
 const Main = require('../dist/main')

spec/minimap-main-spec.js

@@ -1,4 +1,5 @@
 'use strict'
+process.env.NODE_ENV = 'test'
 
 require('./helpers/workspace')
 const { Minimap } = require('../dist/main')

spec/minimap-spec.js

@@ -1,4 +1,5 @@
 'use strict'
+process.env.NODE_ENV = 'test'
 
 require('./helpers/workspace')