[openapi-validator-rulesets] Reduce package size by 88% (6.3MB → 745KB) (#817)

* Initial plan

* Add files field to package.json to exclude unnecessary files

Co-authored-by: mikeharder <9459391+mikeharder@users.noreply.github.com>

* Bump version to 2.2.2 and update CHANGELOG

Co-authored-by: mikeharder <9459391+mikeharder@users.noreply.github.com>

* Simplify files field to use dist/** pattern

Co-authored-by: mikeharder <9459391+mikeharder@users.noreply.github.com>

* Remove CHANGELOG.md from files array (included by default)

Co-authored-by: mikeharder <9459391+mikeharder@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: mikeharder <9459391+mikeharder@users.noreply.github.com>

Author: Copilot

packages/rulesets/CHANGELOG.md

@@ -1,5 +1,12 @@
 # Change Log - @microsoft.azure/openapi-validator-rulesets
 
+## 2.2.2
+
+### Patches
+
+- Reduce package size by 88% (6.3MB → 745KB unpacked) by excluding test files and source TypeScript files
+- Upgrade minimum required Node.js version from 18 to 20
+
 ## 2.2.1
 
 ### Patches

packages/rulesets/package.json

@@ -1,8 +1,13 @@
 {
   "name": "@microsoft.azure/openapi-validator-rulesets",
-  "version": "2.2.1",
+  "version": "2.2.2",
   "description": "Azure OpenAPI Validator",
   "main": "dist/index.js",
+  "files": [
+    "dist/**",
+    "!dist/**/tests/**",
+    "!dist/**/test/**"
+  ],
   "scripts": {
     "build": "tsc && npm run build-esm && npm run rollup-spectral",
     "build-esm": "tsc -p ./tsconfig.spectral.esm.json",
@@ -14,7 +19,7 @@
     "lint": "eslint ./src --ext .ts --max-warnings=0"
   },
   "engines": {
-    "node": ">=18"
+    "node": ">=20"
   },
   "repository": {
     "type": "git",