v0.1.4

• Adds support for bfloat16 mixed precision training via fastxtend's MixedPrecision callback
• Adds two callback utilities for callback developers:
  • CallbackScheduler: a mixin for callback scheduling values during training
  • LogDispatch: a new default callback for logging values from callbacks to WandBCallback & TensorBoardCallback
• Adds GradientAccumulation callback which logs full batches instead of micro-batches
• Adds GradientAccumulationSchedule callback which supports batch size warmup via a schedulable accumulation batch size

Full Changelog: v0.1.3...v0.1.4