ganache instances should show a proper error message

[savvysiddharth]

/usr/lib/node_modules/ganache/dist/node/cli.js:2
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Error: Unknown action: undefined
    at default_1 (/usr/lib/node_modules/ganache/dist/node/cli.js:2:6649)
    at Object.208 (/usr/lib/node_modules/ganache/dist/node/cli.js:2:15741)
    at __webpack_require__ (/usr/lib/node_modules/ganache/dist/node/cli.js:2:19944)
    at Object.787 (/usr/lib/node_modules/ganache/dist/node/cli.js:2:18268)
    at __webpack_require__ (/usr/lib/node_modules/ganache/dist/node/cli.js:2:19944)
    at /usr/lib/node_modules/ganache/dist/node/cli.js:2:20144
    at Function.__webpack_require__.O (/usr/lib/node_modules/ganache/dist/node/cli.js:2:20621)
    at __webpack_require__.x (/usr/lib/node_modules/ganache/dist/node/cli.js:2:20222)
    at Function.__webpack_require__.x (/usr/lib/node_modules/ganache/dist/node/cli.js:2:21893)
    at /usr/lib/node_modules/ganache/dist/node/cli.js:2:21918

I get this output whenever I'm running the command ganache instances, Instead I believe it should give me instruction for correct usage of ganache instances command. Maybe a better output could be the same as ganache instances --help.

[jeffsmale90]

Thanks @savvysiddharth - good find!

We're currently talking to developers such as yourself about how they use detach mode, and how we can make it better!

I'd love to sync with you if you'd be interested in trying out some pre-release detach mode improvements, and letting us know what you think. Your feedback would be really valuable!

Either way, I'll look to get a fix for this issue in the works ASAP.