Accept content type json with empty body

[ghost]

Closes #566

[ghost]

Created this PR because of no response from @purefan in #566 . I want this as I also want same kind of behaviour.

[dherault]

Hello @sulaysumaria, please make the CI green and I'll review :)

[ghost]

The error in CI build is following:

Using NVS for managing Node.js versions on Windows (BETA)
21.21s$ git clone --single-branch https://github.com/jasongin/nvs $NVS_HOME
From https://github.com/dherault/serverless-offline
 * branch            refs/pull/694/merge -> FETCH_HEAD
Cloning into 'C:\ProgramData/nvs'...
The command "git clone --single-branch https://github.com/jasongin/nvs $NVS_HOME" failed and exited with 128 during .
Your build has been stopped.
fatal: unable to access 'https://github.com/jasongin/nvs/': Failed to connect to github.com port 443: Timed out

I believe thats not a code issue. Can you trigger the build again?
Also only one of the windows build is failing with this error. Rest all builds are passed.

@dherault

[ghost]

@dherault, all checks passing.

[dherault]

v5.1.1! 🎉