fix: jest typescript config (#340)

* fix: jest typescript config

* fix: revert formatting

* chore: remove `src/**` from jest script

---------

Co-authored-by: Konrad Jamrozik <kojamroz@microsoft.com>

package.json

@@ -78,13 +78,9 @@
     "oad": "./dist/cli.js"
   },
   "jest": {
+    "preset": "ts-jest",
     "collectCoverage": true,
-    "collectCoverageFrom": [
-      "dist/**/*.js"
-    ],
-    "testMatch": [
-      "**/*[tT]est.js"
-    ],
+    "testMatch": ["**/*[tT]est.ts"],
     "testTimeout": 100000
   },
   "scripts": {
@@ -94,7 +90,7 @@
     "dn.publish": "npm run dn.build && dotnet publish -c release openapi-diff/src/core/OpenApiDiff/OpenApiDiff.csproj",
     "dn.test": "npm run dn.build && dotnet test openapi-diff/src/modeler/AutoRest.Swagger.Tests/AutoRest.Swagger.Tests.csproj",
     "tsc": "tsc",
-    "ts.test": "tsc && jest",
+    "ts.test": "jest",
     "test": "npm run dn.test && npm run ts.test",
     "lint": "eslint . --report-unused-disable-directives --max-warnings 0",
     "lint:fix": "eslint . --fix",