Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: Bug report
 about: Create a report to help us improve
 title: ''
-labels: ''
+labels: bug
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,31 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+<!--
+Please search open and closed issues to avoid duplicates. Maybe what you want has already been discussed or is mentioned in the Readme.
+If you have more than one feature request, open multiple issues (one for each) unless the requests are closely related.
+Note that given the number of feature requests and available developer time, it may take a long time until the feature request gets attention.
+When a "PR" or "contributor needed" label is added, the feature request is accepted, and interested contributors are welcome to work on this (please comment when you're working on an issue).
+-->
+
+**Is your feature request related to a problem? Please describe.**
+<!-- A clear and concise description of what the problem is. -->
+
+**Describe the solution you'd like**
+<!-- A clear and concise description of what you want to happen. -->
+
+**Use case**
+<!-- Provide a clear and concise description of *your use case* and what you thus think is missing, and why. -->
+
+**Describe alternatives you've considered**
+<!-- A clear and concise description of any alternative solutions or features you've considered (if you can think of any). -->
+
+**Additional context**
+<!-- Add any other context or screenshots about the feature request here if suitable and useful.
+If you add screenshots, reduce the size or use thumbnails to keep the issue nicely readable. -->