Please fix issues reported by adapter checker

[mcm1957]

❗ [E184] "common.subscribe" will be removed with js-controller >= 6. Please remove from io-package.json and adapt code if required.
👀 [E145] Missing mandatory translation into de of some "common.news" in io-package.json.
👀 [W145] Missing suggested translation into uk,ru,pt,nl,fr,it,es,pl,zh-cn of some "common.news" in io-package.json.
👀 [W156] Adapter should support admin 5 UI (jsonConfig) if you do not use a React based UI
👀 [W172] "common.localLink" in io-package.json is deprecated. Please define object "common.localLinks": { "_default": "..." }
👀 [W184] "common.materialize" is deprecated for admin >= 5 at io-package.json. Please use property "adminUI".
👀 [W513] "gulpfile.js" found in repo! Think about migrating to @iobroker/adapter-dev package
Ada