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: 0 - Backlog, bug
+labels: bug
 assignees: ryanheise
 
 ---
@@ -40,5 +40,10 @@ If applicable, add screenshots to help explain your problem.
  - Device: [e.g. iPhone6]
  - OS: [e.g. iOS8.1]
 
+**Flutter SDK version**
+```
+insert output of "flutter doctor" here
+```
+
 **Additional context**
 Add any other context about the problem here.

.github/ISSUE_TEMPLATE/documentation-request.md

@@ -2,7 +2,7 @@
 name: Documentation request
 about: Suggest an improvement to the documentation
 title: ''
-labels: 0 - Backlog, documentation
+labels: documentation
 assignees: ryanheise
 
 ---

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest an idea for this project
 title: ''
-labels: 0 - Backlog, enhancement
+labels: enhancement
 assignees: ryanheise
 
 ---