Update issue templates (#34)

Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,42 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Create a file with '...'
+2. Add a path operation function with '....'
+3. Open the browser and call it with a payload of '....'
+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.
+
+**Environment:**
+ - OS: [e.g. Linux / Windows / macOS]
+ - FastAPI Version [e.g. 0.3.0], get it with:
+
+```Python
+import fastapi
+print(fastapi.__version__)
+```
+
+- Python version, get it with:
+
+```bash
+python --version
+```
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[FEATURE]"
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I want to be able to [...] but I can't because [...]
+
+**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.

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,17 @@
+---
+name: Question
+about: Ask a question
+title: "[QUESTION]"
+labels: question
+assignees: ''
+
+---
+
+**Description**
+
+How can I [...]?
+
+Is it possible to [...]?
+
+**Additional context**
+Add any other context or screenshots about the feature request here.