Create Dependabot config file

.github/dependabot.yml

@@ -0,0 +1,26 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: weekly
+    day: saturday
+    time: "03:00"
+    timezone: Europe/Paris
+  open-pull-requests-limit: 10
+  reviewers:
+  - juliushaertl
+  - violoncelloCH
+  ignore:
+  - dependency-name: twemoji
+    versions:
+    - ">= 13.a"
+    - "< 14"
+- package-ecosystem: composer
+  directory: "/"
+  schedule:
+    interval: weekly
+    day: saturday
+    time: "03:00"
+    timezone: Europe/Paris
+  open-pull-requests-limit: 10