Changed .play to a promise function

[DivyeshPuri]

Fixes #267

Demo: https://ongaku-${PULL_REQUEST}.surge.sh

This PR is for [Anime Name].

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• [ ] This issue is an addition to JSON database.
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• [x] This addition is already on ongaku.
  • [x] This PR is an improvement to current addition.
• [x] I have checked my addition locally and it is working and won't break existing entries.
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[anshumanv]

Sori dp 😟, @starkblaze01 will take a look soon 🤗

[starkblaze01]

@DivyeshPuri, need more fixes.

[anshumanv]

Dp promise me you will complete this 😭

[anshumanv]

@DivyeshPuri doko?

[anshumanv]

@DivyeshPuri let's do some code instead of CS