Use correct rule for TypeScript

[prichodko]

We need to use @typescript-eslint/no-unused-expressions instead of ESlint no-unused-expressions , because it can't handle optional chaining.

This code emits warning Expected an assignment or function call and instead saw an expression.

fn?.('hello')

Related:
typescript-eslint/typescript-eslint#1241 (comment)

[robertrossmann]

Thanks, fixed in 2.3.0 🎉