Don't compile jest config in build mode

Author: nex3

tsconfig.build.json

@@ -1,8 +1,7 @@
 {
   "extends": "./tsconfig.json",
   "exclude": [
-    "jest.config.js",
-    "lib/src/vendor/dart-sass/**",
+    "jest.config.ts",
     "**/*.test.ts"
   ]
 }