Update dependency browser-sync to v2.27.10

Author: renovate[bot]

2017/package.json

@@ -7,7 +7,7 @@
   "license": "MIT",
   "devDependencies": {
     "babel-preset-es2015": "^6.24.1",
-    "browser-sync": "~2.10.0",
+    "browser-sync": "2.27.10",
     "gulp": "~3.9.0",
     "gulp-autoprefixer": "~3.0.0",
     "gulp-babel": "^6.1.2",