No support for nullish coalescing operator??

[pbb72]

Sorry if I am missing the point, just getting started with gulp.

It seems to me gulp-strip-debug crashes on a nullish coalescing operator (??):

test.js:

const test = null ?? 42;

Output:

SyntaxError in plugin "gulp-strip-debug"
Message:
    Unexpected token ?
Details:
    index: 19
    lineNumber: 1
    column: 20
    fileName: [...]\test.js
    domainEmitter: [object Object]
    domainThrown: false

[sindresorhus]

https://github.com/sindresorhus/gulp-strip-debug/releases/tag/v5.0.0