add changesets for chainlink contracts (#12399)

contracts/.changeset/README.md

@@ -0,0 +1,8 @@
+# Changesets
+
+Hello and welcome! This folder has been automatically generated by `@changesets/cli`, a build tool that works
+with multi-package repos, or single-package repos to help you version and publish your code. You can
+find the full documentation for it [in our repository](https://github.com/changesets/changesets)
+
+We have a quick list of common questions to get you started engaging with this project in
+[our documentation](https://github.com/changesets/changesets/blob/main/docs/common-questions.md)

contracts/.changeset/config.json

@@ -0,0 +1,16 @@
+{
+  "$schema": "https://unpkg.com/@changesets/[email protected]/schema.json",
+  "changelog": [
+    "@changesets/changelog-github",
+    {
+      "repo": "smartcontractkit/chainlink"
+    }
+  ],
+  "commit": false,
+  "fixed": [],
+  "linked": [],
+  "access": "public",
+  "baseBranch": "develop",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

contracts/package.json

@@ -87,6 +87,9 @@
     "@eth-optimism/contracts": "0.6.0",
     "@scroll-tech/contracts": "0.1.0",
     "@openzeppelin/contracts": "4.9.3",
-    "@openzeppelin/contracts-upgradeable": "4.9.3"
+    "@openzeppelin/contracts-upgradeable": "4.9.3",
+    "@changesets/changelog-github": "^0.4.8",
+    "@changesets/cli": "~2.26.2",
+    "semver": "^7.5.4"
   }
 }