Standard weekly patch release

[1.5.4] - 2021-11-30

Fixed

• Fixed support for --key.help=class with the LightningCLI (#10767)
• Fixed _compare_version for python packages (#10762)
• Fixed TensorBoardLogger SummaryWriter not close before spawning the processes (#10777)
• Fixed a consolidation error in Lite when attempting to save the state dict of a sharded optimizer (#10746)
• Fixed the default logging level for batch hooks associated with training from on_step=False, on_epoch=True to on_step=True, on_epoch=False (#10756)

Removed

• Removed PyTorch 1.6 support (#10367, #10738)

Contributors

@awaelchli @carmocca @kaushikb11 @rohitgr7 @tchaton

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