[Proposal] Compact array after readdirsync

[wenderjean]

Related to #5

When trying to invoke update function the error below was showed to me:

Cannot match against 'undefined' or 'null'.

The problem was happening on destructuring present in line 87, after debugging I found out that the array of functions had an undefined item because inside the function's I had a .DS_Store file.

[undefined, { ... }, { ... }]

My proposal is to filter results right away after readdsync map instruction.

[YoruNoHikage]

Thanks, quick and tiny solution!