Do not include <iosfwd> or declare operator<< when BOOST_NO_IOSTREAM …

…is defined. Fixes #43.

Do not include <iosfwd> or declare operator<< when BOOST_NO_IOSTREAM …

…is defined. Fixes #43.

Apply Node20 workaround

Update .drone.jsonnet

Update .drone.jsonnet

Require GCC 8 for __builtin_FILE for reproducible builds. Fixes #38.

Require GCC 8 for __builtin_FILE for reproducible builds. Fixes #38.

Use __builtin_FUNCSIG() under MSVC 19.35+. Fixes #35.

Use __builtin_FUNCSIG() under MSVC 19.35+. Fixes #35.

Update source_location_test4.cpp