chore: enable dependabot in our active branches and update gitignore (#166)

Author: josecorella

.github/dependabot.yml

@@ -0,0 +1,15 @@
+version: 2
+updates:
+  - package-ecosystem: "maven"
+    directory: "/"
+    schedule:
+      interval: "daily"
+  - package-ecosystem: "maven"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    target-branch: "master-1.x"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.gitignore

@@ -1,6 +1,9 @@
 cleanup.sh
 release.sh
 target
+.settings/
+.project
+.classpath
 .idea/
 *.iml
 .DS_Store