Add method to check if organization has projects enabled

[Katsute]

Describe the bug
A clear and concise description of what the bug is.

Trying to retrieve organization project boards when they are disabled causes a GHException.

To Reproduce
Steps to reproduce the behavior:

1. Disable organization project boards.
2. Use GHOrganization#listProjects()

Expected behavior
A clear and concise description of what you expected to happen.

Behavior is expected, however a boolean method would be nice.

Desktop (please complete the following information):

• OS: Windows 10
• Version: 1.126

Additional context
Add any other context about the problem here.

Add a new method GHOrganization#hasProjects(), similar to GHRepository#hasProjects() to check if projects are enabled.

This information can be retrieved from the organization json under the key has_organization_projects.

[akashRindhe]

@bitwiseman Please help close this issue as the PR has been merged and it is part of the latest release.
Also going forward, is there some way to link the PR to the issue so that the issue will be automatically closed once the PR is merged?

[Katsute]

Closed in #1139