TOSA 0.50.0 release tag - Add a new definition for TOSA levels. Levels define operator parameter ranges that an implementation shall support. This is distinct from a profile that defines the operations and data-types supported - Tensor coordinates are clarified to be 32-bit integer values - Operator clarifications: SLICE, RESIZE, RESCALE - Add the ability to CAST between floating-point types See the git log for all changes.