Upgrade to GitHub-native Dependabot

.github/dependabot.yml

@@ -0,0 +1,29 @@
+version: 2
+updates:
+- package-ecosystem: maven
+  directory: "/"
+  schedule:
+    interval: daily
+    time: "11:00"
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: org.postgresql:postgresql
+    versions:
+    - 42.2.18
+    - 42.2.19
+  - dependency-name: org.liquibase:liquibase-core
+    versions:
+    - 4.2.2
+    - 4.3.0
+    - 4.3.1
+    - 4.3.2
+    - 4.3.3
+  - dependency-name: joda-time:joda-time
+    versions:
+    - 2.10.9
+  - dependency-name: com.squareup.okhttp3:okhttp
+    versions:
+    - 4.9.0
+  - dependency-name: com.google.guava:guava
+    versions:
+    - 29.0-jre