bump eslint@6

package.json

@@ -71,7 +71,7 @@
     "@babel/preset-typescript": "^7.3.3",
     "@types/jest": "^24.0.15",
     "@vant/doc": "^2.3.3",
-    "@vant/eslint-config": "^1.1.2",
+    "@vant/eslint-config": "^1.2.0",
     "@vant/markdown-loader": "^2.0.0",
     "@vant/markdown-vetur": "^1.0.0",
     "@vant/touch-emulator": "^1.0.0",
@@ -86,7 +86,7 @@
     "css-loader": "^3.0.0",
     "csso": "^3.5.1",
     "dependency-tree": "^7.0.2",
-    "eslint": "^5.16.0",
+    "eslint": "^6.0.1",
     "fast-glob": "^3.0.3",
     "gh-pages": "^2.0.1",
     "html-webpack-plugin": "3.2.0",