add mergeable

.github/ISSUE_TEMPLATE/1_Bug_report.md

@@ -3,6 +3,8 @@ name: Bug Report
 about: Report errors and problems
 ---
 
+# Bug Report
+
 <!-- First, thank you for reporting a bug. That takes time and we appreciate that! -->
 
 | Subject        | Details                                                               |

.github/ISSUE_TEMPLATE/2_Feature_request.md

@@ -3,6 +3,8 @@ name: Feature Request
 about: RFC and ideas for new features and improvements
 ---
 
+# Feature Request
+
 <!-- First, thank you for making a request. That takes time and we appreciate that! -->
  
 ## Diff 

.github/ISSUE_TEMPLATE/3_Support_question.md

@@ -3,4 +3,4 @@ name: Support Question
 about: Questions about using this library
 ---
 
-## Question
+# Question

.github/mergeable.yaml

@@ -0,0 +1,20 @@
+version: 2
+mergeable:
+    - when: issues.opened
+      validate:
+          - do: description
+            or:
+                - and:
+                      - must_include:
+                            regex: '^# Bug Report'
+                      - must_include:
+                            regex: 'https:\/\/getrector\.org\/demo\/'
+                - must_exclude:
+                      regex: '^# Bug Report'
+      fail:
+          - do: comment
+            payload:
+                body: >
+                    This bug report is missing a link to reproduction on [getrector.org/demo](https://getrector.org/demo).
+
+                    It will most likely be closed after manual review.