Bundle to both ESM and CJS (#118)

This adds `tsup` as a dev dependency
to bundle for both ESM and CJS targets.
This also adds full CI/CD automation
for easier publish process and changelog
managment using `@changesets/cli`.

.github/workflows/ci.yml

@@ -2,26 +2,26 @@ name: "CI"
 
 on:
   push:
-    branches: [main]
-  pull_request:
+    branches:
+      - "**"
 
 jobs:
   build:
     name: "Run CI pipeline"
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18]
+        node: [18, 20]
     steps:
       - uses: actions/checkout@v3
-      - uses: pnpm/action-setup@v2.2.4
+      - uses: pnpm/action-setup@v2
         with:
-          version: 7.5.1
+          version: 7
       - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node }}
           cache: "pnpm"
-      - run: pnpm i
+      - run: pnpm i --frozen-lockfile
       - run: pnpm run ci
 
       - name: Coverage

.github/workflows/publish.yml

@@ -0,0 +1,37 @@
+name: "Publish"
+
+on:
+  workflow_run:
+    workflows: [CI]
+    branches: [main]
+    types: [completed]
+
+concurrency: ${{ github.workflow }}-${{ github.ref }}
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  publish:
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: pnpm/action-setup@v2
+        with:
+          version: 7
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 20.x
+          cache: "pnpm"
+
+      - run: pnpm install --frozen-lockfile
+      - name: Create Release Pull Request or Publish
+        id: changesets
+        uses: changesets/action@v1
+        with:
+          publish: pnpm run release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}

.npmrc

@@ -0,0 +1 @@
+auto-install-peers=true