* Support opset-13 for squeeze, unsqueeze, maxpool, pad, cast, clip
* merge master and update a operators.md
* resolve comment. revise pool and cast kernel implementation.
* skip fusion when clip min and max is not in initializer
* Integrate BrowserStack with ONNX Runtime Web CI pipeline
* Change to Linux command for BrowserStack CI
* Set preferTriggeringPipeline as true
* Fix a commit fetching script
* Remove wasm binary download from the latest build
* Use release build of WebAssembly
* Disable check-out of commit for testing
* Use commit of WebAssembly build CI pipeline
* Need to issue two PRs to prevent build failure
* support session options and run options. use onnxruntime c api.
* fix lint errors
* add an error code on throwing an exception
* resolve comments. change remaining C++ APIs to C API
