Amalgamate the forward declaration header#3679

Merged

nlohmann merged 3 commits intonlohmann:developfrom falbrechtskirchinger:amalgamate-fwd

Aug 7, 2022

+202-25

Commits on Aug 5, 2022

Amalgamate the forward declaration header
falbrechtskirchinger
committed

Commits on Aug 6, 2022

Update CONTRIBUTING and PULL_REQUEST_TEMPLATE
falbrechtskirchinger
committed

Commits on Aug 7, 2022

Update documentation
falbrechtskirchinger
committed