auto append extension namespace to composer.json file

Signed-off-by: ahmadshah <ahmadshahhafizan@gmail.com>
add pretty print json for 5.3

Signed-off-by: ahmadshah <ahmadshahhafizan@gmail.com>
switch functon visibility

Signed-off-by: ahmadshah <ahmadshahhafizan@gmail.com>
remove unused constant

Signed-off-by: ahmadshah <ahmadshahhafizan@gmail.com>
Merge pull request #4 from elepunk/develop

auto append extension namespace to composer.json file