Changes include:
- use standard names for PE constants
- add some more "noexcept"
- improve upx_is_integral type-trait
- introduce is_same_all and is_same_any type-traits
- prepare TE-size checks in packer.h
- CI updates
Changes include:
- extract headers.h from conf.h
- use "byte" in some more places
- unify "const" coding style
- pefile.cpp: make sort order deterministic
- simplify some other pefile.cpp code
- CI updates
