Updated versions of npm packages and NW builder.

gulpfile.js

@@ -29,7 +29,7 @@ const DEBUG_DIR = './debug/';
 const RELEASE_DIR = './release/';
 
 var nwBuilderOptions = {
-    version: '0.28.3',
+    version: '0.31.0',
     files: './dist/**/*',
     macIcns: './src/images/bf_icon.icns',
     macPlist: { 'CFBundleDisplayName': 'Betaflight Configurator'},

package.json

@@ -62,11 +62,11 @@
     "karma-sinon-chai": "^1.3.4",
     "makensis": "^0.9.0",
     "mocha": "^5.2.0",
-    "nw-builder": "^3.4.1",
+    "nw-builder": "^3.5.2",
     "os": "^0.1.1",
     "platform-dependent-modules": "0.0.14",
     "rpm-builder": "^0.7.0",
-    "sinon": "^5.0.10",
+    "sinon": "^5.1.0",
     "sinon-chai": "^3.1.0",
     "targz": "^1.0.1",
     "temp": "^0.8.3"