UPDATE 1-Tencent to buy British video game company Sumo in $1.3 billion deal

(Adds deal details from statement) July 19 (Reuters) - Chinese tech giant Tencent Holdings will buy video game company Sumo Group in a deal that values the British firm at 919 million pounds ($1.27 billion), the companies said on Monday. Sumo's shareholders will get 513 pence in cash per share,...