remove unneeded condition

[asfktz]

Since arrify already returns the value as is in case its an array, this condition might be unnecessary:
https://github.com/olstenlarck/is-async-function/blob/master/index.js#L59

names = Array.isArray(names) ? names : arrayify(names)

// same as

names = arrayify(names)

arrify source:
https://github.com/sindresorhus/arrify/blob/master/index.js

'use strict';
module.exports = function (val) {
	if (val === null || val === undefined) {
		return [];
	}

	return Array.isArray(val) ? val : [val];
};

[codecov-io]

Codecov Report

Merging #16 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #16   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           1      1           
  Lines          14     14           
=====================================
  Hits           14     14

Impacted Files	Coverage Δ
index.js	100% <100%> (ø)	⬆️

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[tunnckoCore]

Yea, i know.. It was just to skip the calling of arrayify function... some paranoid optimization 🤣

Thanks for the PR anyway!
Cool, addition can be to add check if fn is '[object AsyncFunction]'

[asfktz]

Hmm.. haven't thought of that 😄