Change benchmark results color to magenta
Change benchmark results color to magenta

as white on blue is barely visible in travis

Starcounter-Jack/JSON-Patch,Starcounter-Jack/JSON-Patch,Starcounter-Jack/JSON-Patch,Starcounter-Jack/JSON-Patch,baranga/JSON-Patch,baranga/JSON-Patch,baranga/JSON-Patch,baranga/JSON-Patch