v0.7.1

Fixes

• Ensure Compatibility with latest version of dandelion (e78701c)
• Add links to older versions of documentation (#275)
• Fix issue, where clonotype analysis couldn't be continued after saving and reloading h5ad object (#274)
• Allow "None" values to be present as cell-level attributes during merge_airr_chains (#273)

Minor changes

• Require anndata >= 0.7.6 in conda tests (#266)