Fix include guard in `adapt_assoc_adt.hpp` (boostorg#273)

Don't include std stream headers ourselves (boostorg#270)

Don't include std stream headers ourselves (boostorg#270)

Don't include std stream headers ourselves (boostorg#270)

Don't include std stream headers ourselves (boostorg#270)

Don't include std stream headers ourselves (boostorg#270)

Don't include std stream headers ourselves (boostorg#270)

Remove template arguments redefinition workaround for VS2022 update 5. (

boostorg#268)

Update 5 adds /Zc:templateScope flag which causes compile errors in
typedefs redefining template parameters.

Remove template arguments redefinition workaround for VS2022 update 5. (

boostorg#268)

Update 5 adds /Zc:templateScope flag which causes compile errors in
typedefs redefining template parameters.

Fix Clang 13 `-Wdeprecated-copy` warnings (boostorg#261)

Clang 13 have new warning under the same group