Declare bootstrap as a peer dependency
What does this MR do?
Declares bootstrap as a peer-dependency. Now that gitlab-ui declares its dependency on bootstrap, gitlab-ce imports bootstrap-styles through gitlab-ui, and we aim to depend on gitlab-ui for the UI components used in the gitlab application, moving bootstrap to the peerDependencies
will help us to avoid conflicting versions of bootstrap between the gitlab-ui and gitlab-ce.
Related merge requests: