chore: simplify the issue and pull request templates (#26)

.github/ISSUE_TEMPLATE/BUG_REPORT.md

@@ -0,0 +1,23 @@
+---
+name: Bug report
+about: Create a report to help us improve
+---
+
+### Description of the bug
+How would you shortly summarise the issue?
+
+### To Reproduce
+What steps did you perform which led to this issue?
+
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+
+#### Expected behavior
+What did you expect to have happened?
+
+#### Actual behavior
+What did it actually result in?
+
+### Additional context
+Can you further explain the issue? E.g., information about version/environment or screenshots.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,11 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+
+---
+
+**Describe the feature you'd like**
+A clear and concise description of what you want to happen.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,26 +1,5 @@
-<!--- Provide a general summary of your changes in the Title above -->
+### Linked issue
+Provide the issue(s) which this pull request relates to or fixes.
 
-## Description
-
-Describe your changes in detail.
-
-## Motivation and context
-
-Why is this change required? What problem does it solve?
-
-If it fixes an open issue, please link to the issue here (if you write `fixes #num`
-or `closes #num` within the commit message footer, the issue will be automatically closed when the pull is accepted.)
-
-## Checklist:
-
-Go over all the following points, and put an `x` in all the boxes that apply.
-Please, please, please, don't send your pull request until all of the boxes are ticked.
-
-- [ ] I have read the **[CONTRIBUTING](CONTRIBUTING.md)** document.
-- [ ] My pull request addresses _exactly one_ patch/feature.
-- [ ] I have created a _branch_ for this patch/feature.
-- [ ] Each individual _commit_ in the pull request _is meaningful_.
-- [ ] I have _added tests_ to cover my changes.
-- [ ] If my change requires a change to the _documentation_, I have updated it accordingly.
-
-If you're unsure about any of these, don't hesitate to ask. We're here to help!
+### Additional context
+Are there things the maintainers should be aware of before merging or closing this pull request?