ES2017: Handle non-identifier async method name for class element - https://github.com/jquery/esprima/commit/d6ce054f2e3b6a68f993e3fbd2136e4c064f799c
ES2017: Handle non-identifier async method name for class element - https://github.com/jquery/esprima/commit/d6ce054f2e3b6a68f993e3fbd2136e4c064f799c

sebastienros/esprima-dotnet,sebastienros/esprima-dotnet