fix: workaround dependabot limitation by using two of them (#21)

I'm not sure this works.

See the problem here:
dependabot/dependabot-core#1865

Maybe using Github's dependabot and the old one simultaneously does the trick. Let's see.

.dependabot/config.yml

@@ -0,0 +1,8 @@
+version: 1
+update_configs:
+  - package_manager: "javascript"
+    directory: "/"
+    update_schedule: "live"
+    allowed_updates:
+      - match:
+          dependency_name: "@stoplight/elements-web-components"

.github/dependabot.yml

@@ -9,9 +9,3 @@ updates:
     schedule:
       interval: "monthly"
     versioning-strategy: "increase-if-necessary"
-  - package-ecosystem: "npm"
-    directory: "/"
-    schedule:
-      interval: "daily"
-    allow:
-      - dependency-name: "@stoplight/elements-web-components"