Update dev dependencies

Author: philwareham

package.json

@@ -1,7 +1,7 @@
 {
   "name": "textpattern-default-theme",
   "description": "The default theme that ships as standard with Textpattern CMS.",
-  "version": "4.6.0",
+  "version": "4.6.1",
   "keywords": [
     "skin",
     "theme",
@@ -23,7 +23,7 @@
     "url": "https://github.com/textpattern/textpattern-default-theme/issues"
   },
   "devDependencies": {
-    "autoprefixer": "6.4.1",
+    "autoprefixer": "6.5.0",
     "grunt": "~1.0",
     "grunt-cli": "~1",
     "grunt-concurrent": "2.3.1",
@@ -36,7 +36,7 @@
     "grunt-sass": "1.2.1",
     "grunt-sass-lint": "0.2.0",
     "load-grunt-tasks": "~3.5",
-    "node-sass": "3.9.3",
+    "node-sass": "3.10.1",
     "sass-lint": "1.9.1"
   },
   "scripts": {