feat!: use aegir for ESM-only build/testing/release

BREAKING CHANGE

ESM-only publish

Author: multiformats-mgmt-read-write[bot]

.github/dependabot.yml

@@ -1,11 +1,15 @@
 version: 2
 updates:
-- package-ecosystem: npm
-  directory: "/"
-  schedule:
-    interval: daily
-    time: "10:00"
-  open-pull-requests-limit: 10
-  commit-message:
-    prefix: "deps"
-    prefix-development: "deps(dev)"
+  - package-ecosystem: npm
+    directory: "/"
+    schedule:
+      interval: daily
+      time: "10:00"
+    open-pull-requests-limit: 10
+    commit-message:
+      prefix: "deps"
+      prefix-development: "deps(dev)"
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"