add template to list (#91)

Fix #90

Author: StarpTech

.github/stale.yml

@@ -7,6 +7,8 @@ exemptLabels:
   - 'bug'
   - 'good first issue'
   - 'help wanted'
+  - 'proposal'
+  - 'help wanted'
 # Label to use when marking an issue as stale
 staleLabel: wontfix
 # Comment to post when marking an issue as stale. Set to `false` to disable