EPIC version 0.13.1

What's Changed

• Write specific fields only by @matt-frey in #520
• Remove -fPIC flag by @matt-frey in #519
• Do halo swap for nparg and nsparg by @matt-frey in #523
• Fix OpenMP pragmas by @matt-frey in #528
• Change default value from 1/40 to 1/20 by @matt-frey in #526
• Initialise buoyancy, vorticity and humidity by @matt-frey in #534
• Buoyancy perturbation mode by @matt-frey in #532
• Update Python packages by @matt-frey in #522
• Update Python tools by @matt-frey in #529
• Increase buffer in parcel communication by @matt-frey in #530
• Add data coarsening post-processing tool by @matt-frey in #521
• Update changelog for version 0.13.1 by @matt-frey in #535

Full Changelog: 0.13.0...0.13.1