Update issue templates

Author: kazupon

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Reporting a bug?**
+ - Try to search for your issue, it may have already been answered or even fixed in the development branch.
+ - Check if the issue is reproducible with the latest version of Vue 3. If you are using a pre-release, please indicate the specific version you are using.
+ - For bugs that involves build setups, you can create a reproduction repository with steps in the .github/CONTRIBUTING.md
+ - If your issue is resolved but still open, don’t hesitate to close it. In case you found a solution by yourself, it could be helpful to explain how you fixed it.
+
+**Module versions (please complete the following information):**
+ - `webpack`: 4.x
+ - `vue-loader`: 15.x
+ - `@intlify/vue-i18n-loader`: 2.x
+ - `vue-i18n`: 9.x
+ - `vue`: 3.x
+
+**Reproduction Link**
+GitHub repository that can reproduce the bug.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+ex:
+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**
+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: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+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.