Upgrade to GitHub-native Dependabot

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+- package-ecosystem: maven
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10

pom.xml

@@ -15,9 +15,9 @@
 
     <properties>
         <kemitix-checkstyle.version>5.4.0</kemitix-checkstyle.version>
-        <junit.version>5.7.2</junit.version>
-        <assertj.version>3.20.2</assertj.version>
-        <tiles-maven-plugin.version>2.23</tiles-maven-plugin.version>
+        <junit.version>5.7.1</junit.version>
+        <assertj.version>3.19.0</assertj.version>
+        <tiles-maven-plugin.version>2.20</tiles-maven-plugin.version>
         <kemitix-maven-tiles.version>2.7.0</kemitix-maven-tiles.version>
         <lombok.version>1.18.20</lombok.version>
     </properties>