[Improvement] Toast: adjust background color (#601)

package.json

@@ -82,7 +82,7 @@
     "karma-spec-reporter": "^0.0.32",
     "karma-webpack": "^2.0.9",
     "mocha": "^4.0.1",
-    "postcss": "^6.0.16",
+    "postcss": "^6.0.17",
     "postcss-calc": "^6.0.0",
     "postcss-easy-import": "^3.0.0",
     "postcss-loader": "^2.0.10",
@@ -97,10 +97,10 @@
     "url-loader": "^0.6.2",
     "vant-doc": "1.0.2",
     "vue": "^2.5.13",
-    "vue-loader": "^13.7.0",
+    "vue-loader": "^14.1.0",
     "vue-router": "^3.0.1",
     "vue-sfc-compiler": "^0.0.8",
-    "vue-style-loader": "^3.1.1",
+    "vue-style-loader": "^3.1.2",
     "vue-template-compiler": "^2.5.13",
     "vue-template-es2015-compiler": "^1.6.0",
     "webpack": "^3.10.0",