Francophone Africa has its first unicorn, and if you’ve been following tech on the continent, you will be very unsurprised to hear that it’s coming from the world of fintech. Wave, a U.S. and Senegal-based mobile money provider, has raised $200 million in Series A round of funding. The investment is the largest-ever Series A round for the region, and it values Wave at $1.7 billion. Four big-name backers jointly led the round — Sequoia Heritage, a private investment fund and a subsidiary of Sequoia; Founders Fund; payments giant Stripe;…