Add support to edit and delete a project

[ahhda]

Implements edit and delete project part of #606 (comment)

Manual testing

Before editing the project

After editing the project

After deleting the project

[ahhda]

I have created a single pull request for both the changes since the changes were similar.

Let me know if this needs to be broken into two parts. Thanks! 😇

[s-t-e-v-e-n-k]

I like the direction, just a few things to tidy up before merging. Thanks for your hard work!

[s-t-e-v-e-n-k]

Other delete methods usually return True and check the status returned by GitHub, could you do the same here? You can then self.assertTrrue() in the test case.

[ahhda]

I checked the documentation and the result of the call. The call to the above URL, doesn't return a True or False. It just gets us None.

I checked the other methods as well, none of them return any data.

PyGithub/github/GitRef.py

Lines 68 to 75 in b7894ea

	def delete(self):
	"""
	:calls: `DELETE /repos/:owner/:repo/git/refs/:ref <http://developer.github.com/v3/git/refs>`_
	:rtype: None
	"""
	headers, data = self._requester.requestJsonAndCheck("DELETE", self.url)

PyGithub/github/Branch.py

Lines 250 to 256 in b7894ea

	def remove_protection(self):
	"""
	:calls: `DELETE /repos/:owner/:repo/branches/:branch/protection <https://developer.github.com/v3/repos/branches>`_
	"""
	headers, data = self._requester.requestJsonAndCheck(
	"DELETE", self.protection_url,
	)

PyGithub/github/Migration.py

Lines 154 to 162 in fc4eff3

	def delete(self):
	"""
	:calls: `DELETE /user/migrations/:migration_id/archive <https://developer.github.com/v3/migrations/users>`_
	"""
	headers, data = self._requester.requestJsonAndCheck(
	"DELETE",
	self.url + "/archive",
	headers={"Accept": Consts.mediaTypeMigrationPreview},
	)

Let me know if there is a way around this.

[s-t-e-v-e-n-k]

Right, I was confusing it with another method, sorry.

[s-t-e-v-e-n-k]

Assert the name or something here to just to check at least one of the attributes.

[ahhda]

Resolved. Added a check to test the project name.

[s-t-e-v-e-n-k]

As above -- we should be asserting the function return type too.

[ahhda]

As mentioned here, #1434 (comment), the delete method doesn't return a boolean. Not sure if it would be possible without that.

Checked other tests as well.

PyGithub/tests/Reaction.py

Lines 54 to 55 in 37122cf

	def testDelete(self):
	self.reactions[0].delete()

PyGithub/tests/GitRef.py

Lines 69 to 70 in 37122cf

	def testDelete(self):
	self.ref.delete()

PyGithub/tests/GistComment.py

Lines 68 to 69 in 37122cf

	def testDelete(self):
	self.comment.delete()