* Add `related merge requests` and `closed by` in Issues service
* Rename all issueId variables to issueIid to comply with GitLab API
* Reflect also the change in the unit-test, though only one occurrence was
found.
Gitbeaker has been split up into 5 subpackages: gitbeaker-core, gitbeaker-node, gitbeaker-cli, gitbeaker-browser and gitbeaker-requester-utils.
gitbeaker-[node,cli,browser] are enviroment
specific sub packages. For example, if you want to use gitbeaker in a NodeJS environment, use gitbeaker-node. gitbeaker-core is where all the
base logic exists, and gitbeaker-requester-utils is a collection of utility functions for making custom requester libraries.
BREAKING CHANGE: 🧨 This migration requires users to import specific subpackages. For NodeJS
usage, that would be @gitbeaker/node.
