Update poi and umd build

Author: alessiomaffeis

package.json

@@ -31,6 +31,7 @@
     "babel-preset-env": "^1.6.1",
     "jest": "^22.4.0",
     "jest-serializer-vue": "^0.3.0",
+    "poi": "^12.10.3",
     "vue": "^2.5.13",
     "vue-jest": "^2.1.0",
     "vue-server-renderer": "^2.5.13",

poi.config.js

@@ -1,12 +1,16 @@
 module.exports = {
   entry: './PictureInput.vue',
-  filename: {
-    js: 'vue-picture-input.js'
+  output: {
+    fileNames: {
+      js: 'vue-picture-input.js'
+    },
+    moduleName: 'PictureInput',
+    dir: 'umd',
+    sourceMap: false,
+    html: false,
+    format: 'umd'
   },
-  moduleName: 'PictureInput',
-  extractCSS: false,
-  dist: 'umd',
-  sourceMap: false,
-  html: false,
-  format: 'umd'
+  css: {
+    extract: false
+  }
 }