pre-requisite dependency(node or yarn) version check added in dev.sh file

[sahitya-chandra]

fixed #168

1. First check

• [x] Node is installed or not
• [x] Compatible node version is installed or not

2. Second check

• [x] Yarn is installed or not
• [x] Compatible yarn version is installed or not

If these two checks will pass then only ./dev.sh will run successfully

@jayantbh sir take a look