chore: create dependabot.yml (ionic-team#4585)

dependabot-preview[bot] · web-flow · commit b8e06300dbde · 2020-10-14T17:08:59.000-07:00
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
@@ -0,0 +1,6 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
