(Reuters) -Spotify users in Europe can start to buy audiobooks and subscription plans from within the music-streaming app from March as a result of the region’s new competition law for Big Tech, the Swedish company said on Wednesday. The move will help the company avoid Apple’s 30% fee for purchases through its App Store, which has long been a source of contention between app developers and the tech giant. Spotify has for years been in embroiled in a legal battle, alleging that it was forced to raise the price of its monthly subscriptions to cover costs tied to Apple’s App Store rules. U.S.-li…