Pijamas, a simple fluent assertation library, supports @nogc exceptions

[Luis]

[Pijamas](https://github.com/Zardoz89/pijamas) now supports being 
used inside @nogc blocks, thanks to dip1008 and @nogc 
mir-algorithm exceptions.

This support it's toggles via the use of dub's subConfigurations.

However, a few elements of the Pijamas API aren't available  
inside @nogc blocks. For example .match(Regex), as looks that 
std.regex isn't @nogc compatible.