Add labels to issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,8 +1,8 @@
 ---
 name: Bug report
 about: Create a report to help us improve
-title: "[BUG] "
-labels: ''
+title: ''
+labels: bug
 assignees: ''
 
 ---

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,8 +1,8 @@
 ---
 name: Feature request
 about: Suggest an idea for this project
-title: "[Feature Request]"
-labels: ''
+title: ''
+labels: enhancement
 assignees: ''
 
 ---