Upgrade to GitHub-native Dependabot (#198)

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

.github/dependabot.yml

@@ -0,0 +1,34 @@
+version: 2
+updates:
+- package-ecosystem: gradle
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  assignees:
+  - simonbasle
+  labels:
+  - type/dependency-upgrade
+  ignore:
+  - dependency-name: io.projectreactor:reactor-core
+    versions:
+    - "> 3.2.5.RELEASE"
+  - dependency-name: io.reactivex.rxjava2:rxjava
+    versions:
+    - "> 2.2.18, < 2.3"
+  - dependency-name: me.champeau.gradle.jmh
+    versions:
+    - ">= 0.5.a, < 0.6"
+  - dependency-name: org.junit.platform:junit-platform-launcher
+    versions:
+    - "> 1.0.0"
+  - dependency-name: io.projectreactor.tools:blockhound
+    versions:
+    - 1.0.5.RELEASE
+  - dependency-name: net.bytebuddy:byte-buddy-agent
+    versions:
+    - 1.10.20
+  - dependency-name: net.bytebuddy:byte-buddy
+    versions:
+    - 1.10.20
+  rebase-strategy: disabled