v0.7.0

QuadraticModels v0.7.0

Diff since v0.6.0

Merged pull requests:

• QPDataDense (#53) (@geoffroyleconte)
• LinearOperators in QPData (#56) (@geoffroyleconte)
• Remove QPDataCOO, use SparseMatricesCOO (#58) (@geoffroyleconte)
• Update ci.yml (#59) (@dpo)
• Realease 0.7 (#61) (@geoffroyleconte)