Updating reviewers in dependabot config

Author: sebastian-peter

.github/dependabot.yml

@@ -7,12 +7,8 @@ updates:
     time: "04:00"
   open-pull-requests-limit: 10
   reviewers:
-  - ckittl
-  - johanneshiry
+  - sebastian-peter
   ignore:
-  - dependency-name: com.github.spotbugs
-    versions:
-    - 4.6.2
   - dependency-name: org.scalatest:scalatest_2.13
     versions:
       - "3.3.0-SNAP+"