fix: load tsconfig with a lib that supports extends (#32)

Author: ForbesLindesay

package.json

@@ -71,7 +71,7 @@
     "glob": "^7.1.3",
     "json-stable-stringify": "^1.0.1",
     "minimatch": "^3.0.4",
-    "tsconfig": "^7.0.0",
+    "tsconfig-loader": "^1.1.0",
     "typescript-json-schema": "^0.38.3",
     "yargs": "^13.2.4"
   }

src/Example.validator.ts

@@ -1,9 +1,8 @@
-import {loadSync} from 'tsconfig';
+import loadTsconfig from 'tsconfig-loader';
 
-export default function loadTsConfig(cwd: string = process.cwd()): any {
-  const result = loadSync(cwd);
-  const compilerOptions =
-    (result.config && result.config.compilerOptions) || {};
+export default function loadTsConfig(cwd: string = process.cwd()) {
+  const result = loadTsconfig({cwd});
+  const compilerOptions = result?.tsConfig.compilerOptions || {};
   if (
     compilerOptions.experimentalDecorators === false &&
     compilerOptions.emitDecoratorMetadata === undefined