v2.2.1

Build system

• header only works now as intended (Boost Serialization)
• add compile option -ffp-contract=off or /fp:precise to enhance reproducibility across different systems
• disable building convMPS and duplicates

Fixed bugs

• DualFix: lock rows if variables are dual-fixed to infinity to avoid conflict when dual-postsolving
• ParallelColDetection: avoid segfault by handling already fixed variables separately during sorting
• ParallelColDetection: mark deleted parallel columns as modified to avoid problems when scanning conflicts during the application of the transactions
• ParallelRowDetection: in dual-postsolving flip bound status of non-basic variable for negative factor
• Propagation: avoid numerical difficulties
• SimpleSubstitution: ensure coprime-ness of coefficients for infeasible detection for linear diphantine equations
• Stuffing: store row to allow correct dual-postsolving

Miscellaneous

• update version of fmt from 6.1.2 to 7.1.3 due to deprecation
• MPS-Parser parses files numerically exactly if rational arithmetic is used