Release notes:

• Removed Ruby support in PolyScript layer due issues with mainstream way to publish the module: https://github.com/pyscript/polyscript/pull/83
• Improved error reporting line to report correct line with or without our prepended code and standard library: https://github.com/pyscript/pyscript/pull/1975
• Allowed a sync_main_only flag to workaround missing SharedArrayBuffer cases: https://github.com/pyscript/pyscript/pull/1967
• Solved utf-8 related issues when our standard library is bootstrapped in non utf-8 aware sites: https://github.com/pyscript/pyscript/pull/1981