Add mock to requirements
Add mock to requirements

tribut/vdirsyncer,untitaker/vdirsyncer,tribut/vdirsyncer,credativUK/vdirsyncer,mathstuf/vdirsyncer,untitaker/vdirsyncer,hobarrera/vdirsyncer,mathstuf/vdirsyncer,credativUK/vdirsyncer,hobarrera/vdirsyncer,untitaker/vdirsyncer