lint .vue files as well, fixes #1696

.eslintrc.json

package.json

resources/assets/javascripts/bootstrap/oer.js

resources/assets/javascripts/lib/blubber.js

resources/assets/javascripts/lib/files.js

resources/assets/javascripts/lib/oer.js

resources/vue/components/BlubberGlobalstream.vue

resources/vue/components/BlubberThread.vue

resources/vue/components/BlubberThreadWidget.vue

resources/vue/components/CacheAdministration.vue

resources/vue/components/Datetimepicker.vue

resources/vue/components/EditableList.vue

resources/vue/components/FilesTable.vue

resources/vue/components/I18nTextarea.vue

resources/vue/components/MyCoursesColorPicker.vue

resources/vue/components/MyCoursesNavigation.vue

resources/vue/components/MyCoursesTables.vue

resources/vue/components/MyCoursesTiles.vue

resources/vue/components/StudipDialog.vue

resources/vue/components/StudipFileSize.vue