Quantum Systems, a German drone maker backed by Peter Thiel, boosted its valuation to €3 billion ($3.5 billion) in a new funding round as the defense startup plans to increase production capacity of unmanned aerial systems.The company raised €180 million from investors including Balderton Capital, tripling its valuation from a May round, co-Chief Executive Officer Sven Kruck said in a call with journalists on Thursday. The new round confirms a Bloomberg News report....