Airr

Minor Schema Changes:

+ Corrected schema version number in the `Info` object.

Minor Python Library Changes:

+ Updated versioneer to v0.29.

JavaScript Library

+ Initial release.

Full Release Notes:

+ [Schema release notes](https://docs.airr-community.org/en/v1.5.1/standards/news.html)

Major Schema Changes:

+ Major cleanup, definition clarification, and attribute fixes in the Germline and Genotype schema.
+ Set the default for `x-airr.miarr` attributes to `defined`.
+ Added “IGI” as a valid value to the `locus` enum fields in multiple schema.
+ Added a property type field to the CellExpression object.
+ Updated all enum values to snake_case and added allowance for `null` enum values when appropriate.

Major R and Python Library Changes:

+ Officially dropped support for Python 2.
+ Updated enum validation and template handling in the python library.

Full Release Notes:

+ [Schema release notes](https://docs.airr-community.org/en/v1.5.0/standards/news.html)
+ [Python library release notes](https://docs.airr-community.org/en/v1.5.0/packages/airr-python/news.html)
+ [R library release notes](https://docs.airr-community.org/en/v1.5.0/packages/airr-R/news.html)

Major Schema Changes:

+ Updated quantification fields in the Rearrangement and Clone schemas for better
compatibility with single-cell and emerging technologies. Changes include new
optional fields and modifications to the semantics of existing `*_count` fields.
+ Various new optional fields in the Study, Subject and Rearrangement schemas.
+ Modified how time points and template concentrations are stored in Sample and
NucleicAcidProcessing Schemas.

New Experimental Schema:

+ Experimental releases of new single-cell associated schemas.
+ Experimental releases of germline reference and genotype schemas.
+ Experimental release of data aggregation schemas, including collections of repertoires
and JSON/YAML files bundling multiple AIRR Data Model objects.

Major R and Python Library Changes:

+ Added support for generalized AIRR Data Model files and objects that bundle
multiple data classes.
+ Deprecated support for files storing only Repertoire objects in favor of a general
AIRR Data Model, which is backwards compatible with Repertoire metadata files.

Full Release Notes:

+ [Schema release notes](https://docs.airr-community.org/en/v1.4.1/standards/news.html)
+ [Python library release notes](https://docs.airr-community.org/en/v1.4.1/packages/airr-python/news.html)
+ [R library release notes](https://docs.airr-community.org/en/v1.4.1/packages/airr-R/news.html)

Overview

* Improvements to the organization and wording of various documentation pages.
* Added missing deprecation tags for `rearrangement_id` in the Alignment schema.
* Modified `merge_rearrangement` in the airr python library so that it can handle a large number of files.
* Improved validation error handling in the airr python library.

Full Release Notes:

+ [Schema release notes](https://docs.airr-community.org/en/v1.3.1/standards/news.html)
+ [Python library release notes](https://docs.airr-community.org/en/v1.3.1/packages/airr-python/news.html)