yield reserved word

[0xMySt1c]

because yield is a reserved word in es6 strict mode it causes build to fail when the topic of an event is yield

[saihaj]

I suppose it is code generation causing this issue? I wonder what TypeChain does 🤔

[0xMySt1c]

actually codegen runs fine.
its happening when the wasm bindings are created in build

[YaroShkvorets]

Tracking here: #1896