Update front libs version

web/package.json

@@ -20,30 +20,11 @@
     "del": "^2.2.0",
     "extract-text-webpack-plugin": "^3.0.2",
     "file-loader": "^1.1.6",
-    "gulp": "^3.9.1",
-    "gulp-babel": "^6.1.2",
-    "gulp-changed": "^1.3.0",
-    "gulp-cheerio": "^0.6.2",
-    "gulp-consolidate": "^0.1.2",
-    "gulp-filter": "^4.0.0",
-    "gulp-front-matter": "^1.3.0",
-    "gulp-if": "^2.0.0",
-    "gulp-include": "^2.0.3",
-    "gulp-notify": "^2.2.0",
-    "gulp-plumber": "^1.0.1",
-    "gulp-postcss": "^6.2.0",
-    "gulp-prettify": "^0.4.0",
-    "gulp-pug": "^3.3.0",
-    "gulp-rename": "^1.2.2",
-    "gulp-sass": "^2.1.1",
-    "gulp-sourcemaps": "^1.6.0",
-    "gulp-svgmin": "^1.2.0",
-    "gulp-svgstore": "^5.0.5",
-    "gulp-util": "^3.0.7",
     "lodash": "^4.3.0",
+    "node-sass": "^4.9.0",
     "require-dir": "^0.3.0",
     "run-sequence": "^1.1.5",
-    "sass-loader": "^6.0.6",
+    "sass-loader": "^7.0.1",
     "style-loader": "^0.20.1",
     "through2": "^2.0.1",
     "url-loader": "^0.6.2",