Merge branch 'quasar-upgrade' into 'develop'

.eslintrc.js

.gitlab-ci.yml

package.json

quasar.conf.js

quasar.extensions.json

src/App.vue

src/boot/.gitkeep

src/boot/axios.js

src/boot/filters.js

src/boot/i18n.js

src/boot/vue-router-transition.js

src/components/language-selector.vue

src/components/metadata-visualizer.vue

src/css/app.sass

src/css/app.styl

src/css/quasar.variables.sass

src/css/quasar.variables.styl

src/css/uppy_adaptions.sass

src/layouts/Main.vue

src/pages/Download.vue