Emulators will not launch on Windows due to import issue

[DLehenbauer]

I just tried '5.1.3' and am seeing "TypeError: d is not a function" at 214.js:66973.

The missing function 'd' is the minified call to the 'which' NPM module that I recently added as a new dependency in change #92:

static async _which(e) {
    // ... skipping 'canAccess' check ...    
    var t;
    try {
        return await d(e)  // <--- Call to 'which' NPM package
    }
    catch(t) {
        return new Promise(((s, i)=> {
            l.first([e], (e=>e?s(e): i(t)))
        }
        ))
    }
}

I don't believe there's a regression vs. 5.1.2, as Linux continues to pass the earlier 'canAccess()' check and Windows was previous blocked by the '.exe' suffix issue.

[DLehenbauer]

Appears to be a simple case of an incorrect import. Sorry about missing this when testing the original PR. I suspect I either failed to 'docker cp' the updated .vsix out of the docker container, or still had the emulator in my path and was falling back to 'hasbin'.