This is a major update. It breaks compatibility with v0.4.*.
Gitlab is no longer used. This is because of their announcement that they will be limiting a free user's storage quota to a total of 5 GB. Note that this quota is not per-repository; it is the total across all repositories under the account.
Bitbucket is now used as the secondary remote. It permits 4 GB per repository, along with an unlimited number of repositories.
To migrate your existing gec repos to this release, refer to the Migration section in the readme.