Fix bulma docs css

package.json

@@ -35,7 +35,7 @@
     "deploy": "npm run build && npm run docs",
     "docs": "npm run docs-sass && npm run docs-autoprefix",
     "docs-autoprefix": "postcss --use autoprefixer --map false --output docs/css/bulma-docs.css docs/css/bulma-docs.css",
-    "docs-sass": "node-sass --output-style expanded --source-map false docs/bulma-docs.sass docs/css/bulma-docs.css",
+    "docs-sass": "node-sass --output-style expanded docs/bulma-docs.sass docs/css/bulma-docs.css",
     "start": "npm run build-sass -- --watch",
     "start-docs": "npm run docs-sass -- --watch",
     "start-test": "npm run test-sass -- --watch",