pkg syscall (windows-amd64), const CTRL_SHUTDOWN_EVENT = 6
pkg syscall (windows-amd64), const CTRL_SHUTDOWN_EVENT ideal-int
pkg testing, method (*B) Cleanup(func())
pkg testing, method (*T) Cleanup(func())
pkg testing, type TB interface, Cleanup(func())
pkg unicode, const Version = "12.0.0"
pkg unicode, var Elymaic *RangeTable
pkg unicode, var Nandinagari *RangeTable
pkg unicode, var Nyiakeng_Puachue_Hmong *RangeTable

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# Release 2.21.0

## TensorFlow

### Breaking Changes

* Support for Python 3.9 has been removed starting with TF 2.21.
* The TensorBoard (TB) dependency has been removed starting with TF 2.21.

### Major Features and Improvements

* `tf.lite`
    * Adds int8 and int16x8 support for SQRT operator.
    * Adds int16x8 support for EQUAL and NOT_EQUAL operators.