Minor fix composer.json
Minor fix composer.json

ext-gd to gd
ext-mbstring to mbstring

akhyarrh/grav-test,walutisme/grav-test,akhyarrh/grav-test,walutisme/grav-test,walutisme/grav-test,walutisme/grav-test,akhyarrh/grav-test,akhyarrh/grav-test