chore(lightbox): bump to 6.2.1

Author: pexea12

package.json

@@ -1,7 +1,7 @@
 {
   "name": "vue-image-lightbox",
   "description": "A Vue.js package to display an image gallery lightbox",
-  "version": "6.2.0",
+  "version": "6.2.1",
   "author": "Nguyen Thien Dzung <[email protected]>",
   "license": "MIT",
   "main": "dist/vue-image-lightbox.min.js",
@@ -40,12 +40,12 @@
     "@babel/core": "^7.4.3",
     "@babel/plugin-transform-runtime": "^7.4.3",
     "@babel/preset-env": "^7.4.3",
-    "css-loader": "^0.28.11",
-    "eslint": "^4.19.1",
+    "css-loader": "2.1.1",
+    "eslint": "5.16.0",
     "file-loader": "^1.1.11",
     "html-webpack-plugin": "^3.2.0",
     "mini-css-extract-plugin": "^0.4.0",
-    "optimize-css-assets-webpack-plugin": "^4.0.2",
+    "optimize-css-assets-webpack-plugin": "5.0.1",
     "rimraf": "^2.6.2",
     "style-loader": "^0.21.0",
     "uglifyjs-webpack-plugin": "^1.2.5",