chore: enable "declarationMap" and "sourceMap" in "tsconfig.json"

tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "declaration": true,
-    "declarationMap": false,
+    "declarationMap": true,
     "emitDecoratorMetadata": true,
     "esModuleInterop": true,
     "experimentalDecorators": true,
@@ -12,7 +12,7 @@
     "noImplicitAny": true,
     "removeComments": true,
     "resolveJsonModule": true,
-    "sourceMap": false,
+    "sourceMap": true,
     "strict": true,
     "target": "es6"
   },