Make the versions configurable.

vuejs.module

@@ -13,11 +13,17 @@
  * Implements hook_libraries_info().
  */
 function vuejs_libraries_info() {
+  $version_vue = variable_get('vuejs_version_vue', 'v2.5.2');
+  $version_vue_router = variable_get('vuejs_version_vue_router', 'v3.0.1');
+  $version_vuex = variable_get('vuejs_version_vuex', 'v3.0.0');
+
   $libraries['vue'] = array(
     'name' => 'Vue.js',
     'vendor url' => 'https://github.com/vuejs',
     'download url' => 'https://github.com/vuejs/vue',
-    'download file url' => 'https://github.com/vuejs/vue/archive/v2.5.2.tar.gz',
+    'download file url' => format_string('https://github.com/vuejs/vue/archive/!version.tar.gz', array(
+      '!version' => drupal_encode_path($version_vue),
+    )),
     'path' => 'dist',
     'version arguments' => array(
       'file' => 'package.json',
@@ -35,7 +41,9 @@ function vuejs_libraries_info() {
     'name' => 'The official router for Vue.js',
     'vendor url' => 'https://github.com/vuejs',
     'download url' => 'https://github.com/vuejs/vue-router',
-    'download file url' => 'https://github.com/vuejs/vue-router/archive/v3.0.1.tar.gz',
+    'download file url' => format_string('https://github.com/vuejs/vue-router/archive/!version.tar.gz', array(
+      '!version' => drupal_encode_path($version_vue_router),
+    )),
     'path' => 'dist',
     'version arguments' => array(
       'file' => 'package.json',
@@ -53,7 +61,9 @@ function vuejs_libraries_info() {
     'name' => 'Vuex',
     'vendor url' => 'https://github.com/vuejs',
     'download url' => 'https://github.com/vuejs/vuex',
-    'download file url' => 'https://github.com/vuejs/vuex/archive/v3.0.0.tar.gz',
+    'download file url' => format_string('https://github.com/vuejs/vuex/archive/v3.0.0.tar.gz', array(
+      '!version' => drupal_encode_path($version_vuex),
+    )),
     'path' => 'dist',
     'version arguments' => array(
       'file' => 'package.json',