[bugfix] Field: multi line label stye error (#583)

package.json

@@ -66,7 +66,7 @@
     "css-loader": "^0.28.9",
     "dependency-tree": "^6.0.0",
     "eslint": "^4.16.0",
-    "eslint-plugin-vue": "^4.2.0",
+    "eslint-plugin-vue": "^4.2.2",
     "extract-text-webpack-plugin": "3.0.2",
     "fast-vue-md-loader": "^1.0.3",
     "friendly-errors-webpack-plugin": "^1.6.1",
@@ -92,7 +92,7 @@
     "shelljs": "^0.8.1",
     "sinon": "^2.4.1",
     "sinon-chai": "^2.12.0",
-    "style-loader": "^0.19.1",
+    "style-loader": "^0.20.1",
     "uppercamelcase": "^3.0.0",
     "url-loader": "^0.6.2",
     "vant-doc": "1.0.2",
@@ -100,7 +100,7 @@
     "vue-loader": "^13.7.0",
     "vue-router": "^3.0.1",
     "vue-sfc-compiler": "^0.0.8",
-    "vue-style-loader": "^3.0.0",
+    "vue-style-loader": "^3.1.1",
     "vue-template-compiler": "^2.5.13",
     "vue-template-es2015-compiler": "^1.6.0",
     "webpack": "^3.10.0",