"body-parser" should not be dev-dependency

[bkilinc]

"body-parser" is in "devDependencies" section. It should be in "dependencies" section.

[Uzlopak]

I disagree, as the body-parser is not needed at all.

[paularah]

I share the same opinion with @Uzlopak I think body-parser as an external dependency has been deprecated from express, so there's no need for it.