Update status of deprecated features

Corresponding compiler fixes by @yebblies 
https://github.com/D-Programming-Language/dmd/pull/3911
https://github.com/D-Programming-Language/dmd/pull/3912
https://github.com/D-Programming-Language/dmd/pull/3913
https://github.com/D-Programming-Language/dmd/pull/3914
https://github.com/D-Programming-Language/dmd/pull/3915
https://github.com/D-Programming-Language/dmd/pull/3916
https://github.com/D-Programming-Language/dmd/pull/3917