Update issue templates

.github/ISSUE_TEMPLATE/---bug-report.md

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+---
+name: "\U0001F41B Bug report"
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+### Device info
+
+- OS: [eg. iOS/Android]
+- OS version: [eg. 10]
+- Device: [eg. OnePlus 6]
+
+### Describe the bug
+A clear and concise description of what the bug is.
+
+### Steps to reproduce
+
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+### Expected behavior
+A clear and concise description of what you expected to happen.
+
+### Screenshots/Screencasts
+If applicable, add screenshots to help explain your problem.
+
+### Additional context
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/---feature-request.md

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+---
+name: "\U0001F680 Feature request"
+about: Suggest an idea for Lemmur
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+### 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.