Release 2.1.3

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Improvements

• kullback_leiblers.gauss_kl: when running TensorFlow >= 2.2, we avoid a tf.tile() that was a workaround for broadcasting issues in TensorFlow <= 2.1; the workaround is now only executed when running in TensorFlow 2.1 (Remove tiling workaround for lack of broadcasting in previous TensorFlow versions #1585).

Bugfixes

• model.predict_y/predict_log_density now explicitly raise NotImplementedError when passed full_(output_)cov=True (Explicit NotImplementedError on predict_y/predict_log_density with full_(output_)cov=True #1582). Actual implementation of the full_(output_)cov=True case remains an open issue (predict_y and predict_log_density support for full_cov or full_output_cov #1461).
• bugfix for conditionals.multioutput.util.independent_interdomain_conditional (Bugfix for independent_interdomain_conditional #1583).

Docs and infrastructure

• CI/infrastructure updates (enable trigger-docs-generation for master branch as well #1580, Update issue templates #1581, fix broken API docs #1587, Doc requirements update #1592).
• heteroskedastic notebook cleaned up, links added (Fix notebook heading levels and add links #1579).
• intro_to_gpflow2 notebook updated to account for saved_model now working (update intro_to_gpflow2 notebook to account for saved_model now working #1586).