v2.9.0

Changes:

• e9bb586 update requirements (#821)
• 3a92538 update azure-pipelines.yml (#820)
• 5aa7c18 avoid graph overlapping legend in spectrum analyzer (#816)
• 8506d20 CI: build on windows without -j (#815)
• d300ba5 Improve Auto Interpretation Performance (#814)
• 217a814 improve sdr check fix #811 (#812)
• cfae883 use costas loop for PSK demod (#807)
• 1fcf4ae consider checksum label in copy operation (#803)

This list of changes was auto generated.