feat: Move to ESM (#98)

BREAKING CHANGE: Use ESM
BREAKING CHANGE: Use Probot v13
BREAKING CHANGE: Move to Node 20

Author: AaronDewes

Diff for: .github/workflows/inception.yml

@@ -7,11 +7,11 @@ jobs:
   issuesOpened:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
           cache: npm
-          node-version: 16
+          node-version: 20
       - run: npm ci
       - run: npm run build
       - uses: ./

Diff for: .github/workflows/release.yml

@@ -8,10 +8,10 @@ jobs:
     name: release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: lts/*
+          node-version: 20
           cache: npm
       - run: npm ci
       - run: npm run build

Diff for: .github/workflows/test.yml

@@ -9,10 +9,10 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
           cache: npm
-          node-version: 16
+          node-version: 20
       - run: npm ci
       - run: npm test

Diff for: action.yml

@@ -4,5 +4,5 @@ branding:
   icon: "gift"
   color: orange
 runs:
-  using: "node12"
+  using: "node20"
   main: "dist/index.js"

Diff for: app.js

@@ -1,8 +1,8 @@
 /**
  * @param {import('probot').Probot} app
  */
-module.exports = (app) => {
-  app.log("Yay! The app was loaded!");
+export default (app) => {
+  app.log.info("Yay! The app was loaded!");
 
   app.on("issues.opened", async (context) => {
     return context.octokit.issues.createComment(