chore: add changesets

Author: bennypowers

.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)

.changeset/config.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "https://unpkg.com/@changesets/config@1.6.0/schema.json",
+  "changelog": "@changesets/cli/changelog",
+  "commit": false,
+  "linked": [],
+  "access": "restricted",
+  "baseBranch": "master",
+  "updateInternalDependencies": "patch",
+  "ignore": []
+}

.github/workflows/main.yml

@@ -11,7 +11,7 @@ on:
       - main
 
 jobs:
-  test:
+  test-and-release:
     runs-on: ubuntu-latest
 
     steps:
@@ -26,3 +26,16 @@ jobs:
 
       - name: Run Tests
         run: yarn test
+
+      - name: Create Release Pull Request or Publish to npm
+        # Prevents changesets action from creating a PR on forks
+        if: github.repository == 'open-wc/custom-elements-manifest'
+        id: changesets
+        uses: changesets/action@master
+        with:
+          publish: yarn release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NPM_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

package.json

@@ -12,11 +12,13 @@
   },
   "scripts": {
     "docs": "rocket build",
+    "release": "changeset publish",
     "start": "rocket start",
     "test": "yarn workspaces run test"
   },
   "dependencies": {},
   "devDependencies": {
+    "@changesets/cli": "^2.16.0",
     "@rocket/blog": "^0.3.0",
     "@rocket/cli": "^0.9.6",
     "@rocket/launch": "^0.5.3",