add issue template (#135)

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,20 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**What happened**:
+
+**What you expected to happen**:
+
+**How to reproduce it (as minimally and precisely as possible)**:
+
+**Anything else we need to know?**:
+
+**Environment**:
+- syft version (use `syft version -v`):
+- OS (e.g: `cat /etc/os-release` or similar):

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,15 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+
+---
+
+**What would you like to be added**:
+
+**Why is this needed**:
+
+**Additional context**:
+<!-- Add any other context or screenshots about the feature request here. -->