message: page_facing_up: changes to let Github detect the license
diff: -JSON for Modern C++ is licensed under the MIT License
  -<http://opensource.org/licenses/MIT>:
  +MIT License
  Copyright (c) 2013-2017 Niels Lohmann
  -Permission is hereby granted, free of charge, to any person obtaining a copy of
  -this software and associated documentation files (the "Software"), to deal in
  -the Software without restriction, including without limitation the rights to
  -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  -of the Software, and to permit persons to whom the Software is furnished to do
  -so, subject to the following conditions:
  +Permission is hereby granted, free of charge, to any person obtaining a copy
  +of this software and associated documentation files (the "Software"), to deal
  +in the Software without restriction, including without limitation the rights
  +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  +copies of the Software, and to permit persons to whom the Software is
  +furnished to do so, subject to the following conditions:
  The above copyright notice and this permission notice shall be included in all
  copies or substantial portions of the Software.
  