Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,31 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**Reproducible Minimal Working Example **
+Provide a concise Python code snippet that demonstrates the issue. To display the code clearly, use [GitHub Flavored Markdown](http://github.github.com/github-flavored-markdown/) for formatting:
+
+```python
+import xeofs as xe
+
+model = xe.models.EOF()
+...
+```
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Desktop (please complete the following information):**
+ - OS: [e.g. Ubuntu]
+ - `xeofs` version [e.g. 1.2.0]
+
+**Additional context**
+Add any other context about the problem here.