Michael Withagen

Resolves #93

The ssh method is missing on the pipelines namespace. Expected: ``` new Client()->repositories()->workspaces('xyz')->pipelines('repo')->ssh()->keyPair()->... ``` Actual: Work around: ``` use Bitbucket\Api\Repositories\Workspaces\PipelinesConfig\Ssh; new Ssh($client, 'workspace', 'repo')->keyPair()->...etc ```