:construction_worker: added Clang 5.0 (see https://docs.travis-ci.com/user/languages/cpp/#clang)
:construction_worker: added Clang 5.0 (see https://docs.travis-ci.com/user/languages/cpp/#clang)

theodelrieu/json,kaidokert/json,nlohmann/json,kaidokert/json,theodelrieu/json,nlohmann/json,nlohmann/json,kaidokert/json