See https://github.com/nlohmann/json/pull/212 for details

Add version and license to meson.build

#1179 Reordered the code. It seems to stop clang 3.4.2 in RHEL 7 from crash…

Use a version check to provide backwards comatible CMake imported target names

See https://lgtm.com/projects/g/nlohmann/json

See https://blog.travis-ci.com/2018-09-13-xcode-10-is-now-available?utm_source=twitter&utm_medium=web&utm_campaign=xcode10_gm

Better error 305

Move lambda out of unevaluated context

Remove static asserts

Addresses #1220

Export package to allow builds without installing

Fix #1213