Starting with last week’s Hue Bridge firmware update, Philips is now blocking third-party bulbs that haven not been tested with the Hue system. In a post on its developer blog, Hue provided an update on “Friends of Hue” — the company’s program for certifying third-party apps and hardware to work with the Hue Bridge — noting that due to “an increasing number of interoperability issues” the latest firmware updates…