chore: bundle vendor code (#9016)

This PR removes the manual vendoring process. Third party code can now
be updated using the typical NPM pipeline with types/code bundling done
through Rollup.

.eslintrc.js

@@ -103,7 +103,7 @@ module.exports = {
           {
             name: 'mitt',
             message:
-              'Import Mitt from the vendored location: vendor/mitt/src/index.js',
+              'Import Mitt from the vendored location: vendor/mitt/index.js',
           },
         ],
       },

.prettierignore

@@ -42,6 +42,5 @@ CHANGELOG.md
 package-lock.json
 package.json
 test/assets/
-vendor/
 docs/
 versioned_*/

docs/api/puppeteer.eventtype.md

@@ -7,5 +7,5 @@ sidebar_label: EventType
 **Signature:**
 
 ```typescript
-export declare type EventType = string | symbol;
+declare type EventType = string | symbol;
 ```

docs/api/puppeteer.handler.md

@@ -7,5 +7,5 @@ sidebar_label: Handler
 **Signature:**
 
 ```typescript
-export declare type Handler<T = any> = (event?: T) => void;
+declare type Handler<T = any> = (event?: T) => void;
 ```

package.json

@@ -57,10 +57,11 @@
     "check:protocol-revision": "tsx scripts/ensure-correct-devtools-protocol-package",
     "check:pinned-deps": "tsx scripts/ensure-pinned-deps",
     "build": "npm run build:prod",
-    "build:dev": "run-s generate:sources build:tsc:dev generate:artifacts",
-    "build:prod": "run-s generate:sources build:tsc:prod generate:artifacts",
+    "build:dev": "run-s generate:sources build:tsc:dev && run-p bundle:vendor generate:artifacts",
+    "build:prod": "run-s generate:sources build:tsc:prod && run-p bundle:vendor generate:artifacts",
     "build:tsc:dev": "tsc -b test",
-    "build:tsc:prod": "tsc -b tsconfig.lib.json"
+    "build:tsc:prod": "tsc -b tsconfig.lib.json",
+    "bundle:vendor": "rollup --config rollup.vendor.config.js"
   },
   "files": [
     "lib",
@@ -129,12 +130,16 @@
     "jpeg-js": "0.4.4",
     "mime": "3.0.0",
     "minimist": "1.2.6",
+    "mitt": "2.1.0",
     "mocha": "10.0.0",
     "ncp": "2.0.0",
     "npm-run-all": "4.1.5",
     "pixelmatch": "5.3.0",
     "pngjs": "6.0.0",
     "prettier": "2.7.1",
+    "rollup": "2.79.1",
+    "rollup-plugin-dts": "4.2.2",
+    "rollup-plugin-node-resolve": "5.2.0",
     "semver": "7.3.7",
     "sinon": "14.0.0",
     "source-map-support": "0.5.21",