Webdnn

Features:

- implement sqrt operator (920)
- implement Normalize (921)

Bugfix:

- Support Module.buffer removal in emscripten (v1.38.30) (923)

Please note that v1.2.9 has issue on build, so skipped.

Bugfix:
- Buffer size error of WebGL (906)
- Batch normalization of Caffe (911)

Support WebMetal (renamed from WebGPU) (912)

This update includes follow improvements:
- Support latest pytorch's alexnet (894), resnet (900)
- Workaround for stack overflow for large model (900)

This update includes follow bug-fixes:

* Fix getImageArrayFromDrawable (850) thanks to marcorighini
* Fix unroll_concat when the number of input is odd (853)
* Fix IE11 support (856,874)
* Fix issue with multiple networks due to global transformUrlDelegate (858) thanks to alessandrolenzi
* Support emscripten v1.38.1 (880)

Supported Chainer v4 (832).

This update includes follow bug-fixes:

- ImageData handling in getImageArray (838)
- Apply transformUrlDelegate to wasm file (842)

This update includes follow bug-fixes:

Bugs in WebGL texture allocation (816, 825)
Bugs in texture splitting (820, 822)