v5.1.2

Fixed

• Ctrl+C during eigendecomposition now exits immediately instead of blocking
  until the LAPACK call finishes
• Progress bar no longer shows 100% before propagating worker exceptions
  (MemoryError, LinAlgError)
• Broken pipe on stdout no longer masks eigendecomposition results
• Remove meaningless AdaptiveETA widget from time-based progress bar

Added

• Tests for timed_progress(): exception propagation, 99% cap, error display,
  estimated_seconds=0 edge case