v0.4.0

What's Changed

• Use None to access non-dictionary data by @gerlero in #154
• Rename FoamDict to FoamFileBase by @gerlero in #155
• Make FoamFileIO private by @gerlero in #156
• Hide FoamFile header from iter by @gerlero in #157
• Remove FoamFile.Header class by @gerlero in #158
• Add create method to FoamFile by @gerlero in #159
• Add delitem methods by @gerlero in #160
• Fix AsyncFoamCase cpus handling by @gerlero in #161
• Update pytest-asyncio requirement from <0.24,>=0.21 to >=0.21,<0.25 by @dependabot in #162
• Improve serialization by @gerlero in #163
• Improve serialization by @gerlero in #164
• Improve serialization by @gerlero in #165

Full Changelog: v0.3.21...v0.4.0