Fix build: move uglifyjs dep to uglify-js
Fix build: move uglifyjs dep to uglify-js

uglifyjs have gained a hyphen for some reason, and replaced th
old one with a stub package.

matrix-org/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk,krombel/matrix-js-sdk,krombel/matrix-js-sdk,matrix-org/matrix-js-sdk