no-unused-expressions warning for optional chaining

Created by: iansan5653

Describe the bug

I just upgrade react-scripts to 3.3.0. I am able to use nullish coalescing, but when I attempt to use optional chaining, I can't compile as I get this error:

./src/components/Select/Select.tsx
  Line 141:5:  Expected an assignment or function call and instead saw an expression  no-unused-expressions

Search for the keywords to learn more about each error.

The line in question is:

    this.props.onChange?.(resultingValue);

Did you try recovering your dependencies?

No, I don't have time at the moment. If this might help I'll try it.

Which terms did you search for in User Guide?

I searched for optional chaining, no-unused-expressions, eslint optional chaining.

Environment

npx: installed 91 in 30.467s

Environment Info:

  System:
    OS: Windows 10 10.0.17134
    CPU: (8) x64 Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz
  Binaries:
    Node: 12.2.0 - C:\Program Files\nodejs\node.EXE
    Yarn: Not Found
    npm: 6.9.0 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: 42.17134.1098.0
    Internet Explorer: 11.0.17134.1
  npmPackages:
    react: ^16.12.0 => 16.12.0
    react-dom: ^16.12.0 => 16.12.0
    react-scripts: 3.3.0 => 3.3.0
  npmGlobalPackages:
    create-react-app: Not Found

Steps to reproduce

Use optional chaining.
Attempt to run npm start.

Expected behavior

I expected the app to compile and for the code to function like:

    this.props.onChange !== undefined && this.props.onChange(resultingValue);

Actual behavior

The app failed to compile and gave the above message.