ci: add dependabot (#7)

We will use dependabot to manage package updates

Author: graham-chainlink

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: '/'
+    schedule:
+      interval: weekly
+  - package-ecosystem: gomod
+    directory: '/'
+    schedule:
+      interval: weekly
+  - package-ecosystem: npm
+    directory: "/"
+    schedule:
+      interval: "weekly"

package.json

@@ -9,8 +9,8 @@
   },
   "author": "@smartcontractkit",
   "devDependencies": {
-    "@changesets/changelog-github": "^0.5.0",
-    "@changesets/cli": "~2.27.12",
+    "@changesets/changelog-github": "^0.5.1",
+    "@changesets/cli": "^2.29.0",
     "changeset": "^0.2.6"
   },
   "repository": "https://github.com/smartcontractkit/chainlink-deployments-framework"