v0.4.0

What's Changed

• Add: Custom base64 decode callbacks by @spnda
• Change: Rework DataSource to use std::variant by @spnda
• Change: Remove Options::DontUseSIMD by @spnda
• Change: Don't always check if the given directory is valid by @spnda
• Change: Use std:: prefixed integer types by @spnda
• Fix: Avoid segfault with MinGW by @spnda
• Fix: Rework Category enum due to parsing bug by @spnda
• Fix: More C++ version checks by @spnda
• Fix: Avoid dangling pointer to GLB bytes by @spnda
• Fix: Rare overflow warning due to signed-by-default char by @spnda
• Fix: Various minor CMake issues by @spnda
• Bump simdjson to 3.1.6 by @spnda
• Const-ify GltfBufferData::copyBytes by @Eearslya in #10

Full Changelog: v0.3.0...v0.4.0