* Test case for wasm out of memory error
* Restart wasm instance after N blocks
* Handle out of memory error and re instantiate WASM
* Remove old instance from map before reinstantiating WASM
* Implement host api for bigint operations
* Implement type conversion APIs
* Avoid use of exports as variable name for conflict
* Implement log API with debug and levels
* Fix job-runnner hook error after stopping and starting chain
* Code for running wasm file.
* Add test for wasm exported function.
* Use target names for build files.
Co-authored-by: nabarun <nabarun@deepstacksoft.com>