chore: add thye initial release changelog

Author: collins-w

.changeset/config.json

@@ -8,5 +8,5 @@
   ],
   "commit": false,
   "access": "restricted",
-  "baseBranch": "main"
+  "baseBranch": "v0-1-0"
 }

.changeset/cool-llamas-cough.md

@@ -0,0 +1,5 @@
+---
+'@openzeppelin/relayer-sdk': minor
+---
+
+The initial release, v0.1.0.

scripts/state.js

@@ -62,7 +62,7 @@ async function getState({ github, context, core }) {
     refName,
     hasPendingChangesets: changesets.length > 0,
     prerelease: preState?.mode === 'pre',
-    isMain: refName === 'main',
+    isMain: refName === 'v0-1-0',
     isReleaseBranch: refName.startsWith('release-v'),
     isWorkflowDispatch: context.eventName === 'workflow_dispatch',
     isPush: context.eventName === 'push',
@@ -75,7 +75,7 @@ async function getState({ github, context, core }) {
     owner: context.repo.owner,
     repo: context.repo.repo,
     head: `${context.repo.owner}:merge/${state.refName}`,
-    base: 'main',
+    base: 'v0-1-0',
     state: 'open',
   });