update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,40 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: 'Status: Review Needed'
+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 I18n v8.x. 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):**
+ - `vue`: 2.x
+ - `vue-i18n`: 8.x
+
+**Reproduction Link**
+A minimal JSBin, JSFiddle, Codepen, CodeSandbox, or a GitHub reprository that can reproduce the bug.
+
+You can use reproduction jsfiddle template: https://jsfiddle.net/kazupon/rn724baz/3/
+
+**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.