Update to c-crdtlib v1.0.0

Depends on c-crdtlib#87 (closed)

• Use String type instead of generic T
• remove CObject, use DeltaCRDT

added Workflow::Product Backlog feature::enhancement labels

mentioned in issue #3 (closed)

mentioned in issue #4 (closed)

added Workflow::Sprint backlog label and removed Workflow::Product Backlog label

added Workflow::In Progress label and removed Workflow::Sprint backlog label

created merge request !6 (merged) to address this issue

mentioned in merge request !6 (merged)

marked the checklist item Use String type instead of generic T as completed

marked the checklist item remove CObject, use DeltaCRDT as completed

changed the description

mentioned in commit 5f60a36f

closed with merge request !6 (merged)