DAPHNE 0.3-rc1

Second release candidate for v0.3 containing a number of bug fixes and improvements.
This time making use of the "generate release notes" feature.
Please test and report (in the form of GitHub issues)

What's Changed

• 657 DaphneLib implement indexing by @saminbassiri in #771
• Implementation of new SparsityOp by @Garic152 in #790
• Improve performance of the transposition of CSR matrices by @GuilloteauQ in #798
• 788 closing mem leaks by @corepointer in #791
• [DAPHNE-#774] Simplification rewrites for elementwise unary minus (ad… by @ldirry in #796
• [DAPHNE-#775] Support for unary minus in DaphneLib by @ldirry in #792
• [DAPHNE-#755] Initial support for lists in DaphneDSL. by @pdamme in #806
• Implementation of CSR/CSR Matrix Multiplication (@) by @GuilloteauQ in #799
• [DAPHNE-#773] Undetected invalid script args by @ldirry in #800

New Contributors

• @ldirry made their first contribution in #796

Full Changelog: 0.3-rc0...0.3-rc1