Remove psr-0 entry for tests in composer.json
Remove psr-0 entry for tests in composer.json

Ninir/Stampie,stof/Stampie,henrikbjorn/Stampie,Ninir/Stampie,stof/Stampie,henrikbjorn/Stampie,shyam-habarakada/Stampie,shyam-habarakada/Stampie,flint/Stampie,Stampie/Stampie