adapt issue templates to new issue types, part of #453

Author: KonradHoeffner

.github/ISSUE_TEMPLATE/bugreport.yml

@@ -1,6 +1,6 @@
 name: Bug Report
 description: File a bug report.
-labels: ["bug"]
+type: bug
 assignees:
   - KonradHoeffner
 body:

.github/ISSUE_TEMPLATE/featurerequest.yml

@@ -1,6 +1,6 @@
 name: Feature Request
 description: Suggest a new feature.
-labels: ["feature"]
+type: feature
 assignees:
   - KonradHoeffner
 body:

.github/ISSUE_TEMPLATE/release.yml

@@ -1,6 +1,7 @@
 name: Release
 description: Create a new Release.
 title: Release
+type: task
 labels: ["release"]
 assignees:
   - KonradHoeffner

.github/ISSUE_TEMPLATE/task.yml

@@ -0,0 +1,11 @@
+name: Task
+type: task
+assignees:
+  - KonradHoeffner
+body:
+  - type: textarea
+    id: task
+    attributes:
+      label: The new task
+    validations:
+      required: true