use new multiple issue templates (#2600)

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Report incorrect or unexpected behavior of discord.js
+
+---
+
+<!--
+If you need help with discord.js installation or usage, please go to the discord.js Discord server instead:
+  https://discord.gg/bRCvFy9
+This issue tracker is only for bug reports and enhancement suggestions. You won't receive any basic help here.
+-->
+
+**Please describe the problem you are having in as much detail as possible:**
+
+
+**Include a reproducible code sample here, if possible:**
+```js
+
+```
+
+**Further details:**
+
+- discord.js version:
+- node.js version:
+- Operating system:
+- Priority this issue should have – please be realistic and elaborate if possible:
+
+<!--
+If either of these applies to you, please check the respective checkbox: [ ] becomes [x].
+You don't have to modify the text to suit your particular situation, if you want to
+elaborate please do so in the description.
+While it's not a requirement to test your issue on the master branch, it would make fixing
+the problem a lot easier for us, so please do it if possible.
+-->
+- [ ] I found this issue while running code on a __user account__
+- [ ] I have also tested the issue on latest master, commit hash:

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Request a new feature that discord.js is missing
+
+---
+
+<!--
+If you need help with discord.js installation or usage, please go to the discord.js Discord server instead:
+  https://discord.gg/bRCvFy9
+This issue tracker is only for bug reports and enhancement suggestions. You won't receive any basic help here.
+-->
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.