Bump node-sass from 4.10.0 to 4.11.0 in /build

Bumps [node-sass](https://github.com/sass/node-sass) from 4.10.0 to 4.11.0.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/node-sass/compare/v4.10.0...v4.11.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

build/package-lock.json

@@ -1449,7 +1449,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -1864,7 +1865,8 @@
         "safe-buffer": {
           "version": "5.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -1920,6 +1922,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -1963,12 +1966,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -3220,9 +3225,9 @@
       }
     },
     "node-sass": {
-      "version": "4.10.0",
-      "resolved": "https://registry.npmjs.org/node-sass/-/node-sass-4.10.0.tgz",
-      "integrity": "sha512-fDQJfXszw6vek63Fe/ldkYXmRYK/QS6NbvM3i5oEo9ntPDy4XX7BcKZyTKv+/kSSxRtXXc7l+MSwEmYc0CSy6Q==",
+      "version": "4.11.0",
+      "resolved": "https://registry.npmjs.org/node-sass/-/node-sass-4.11.0.tgz",
+      "integrity": "sha512-bHUdHTphgQJZaF1LASx0kAviPH7sGlcyNhWade4eVIpFp6tsn7SV8xNMTbsQFpEV9VXpnwTTnNYlfsZXgGgmkA==",
       "dev": true,
       "requires": {
         "async-foreach": "^0.1.3",

build/package.json

@@ -23,7 +23,7 @@
     "karma-junit-reporter": "^1.2.0",
     "karma-phantomjs-launcher": "^1.0.4",
     "karma-viewport": "^1.0.2",
-    "node-sass": "~4.10.0",
+    "node-sass": "~4.11.0",
     "phantomjs-prebuilt": "*",
     "sinon": "<= 5.0.7"
   },