v2.27.0

Added

• Add SaleTunnelNotValidated step into SaleTunnel
• Add WarningIcon component

Changed

• Improve Lyra error management to abort payment properly

Fixed

• Use CB logo as fallback if credit card is unknown
• Put CunninghamProvider at root level
• Resubmit order on payment failure
• Render course run resource link with button look'n feel when it does not match
  a LMS Backend
• Manage display of CourseRun dates when end date and/or enrollment date are
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