Fix lack of source maps in ESM output

Author: flevi29

tsconfig.build.json

@@ -1,5 +1,11 @@
 {
-    "extends": "./tsconfig.json",
-    "compilerOptions": { "outDir": "./dist/esm" },
-    "include": ["src/**/*.ts"]
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "declarationDir": "./dist/types",
+    "sourceMap": true,
+    "outDir": "./dist/esm"
+  },
+  "include": ["src/**/*.ts"]
 }

tsconfig.json

@@ -2,9 +2,6 @@
   "compilerOptions": {
     // We don't want to check node_modules
     "skipLibCheck": true,
-    "declaration": true,
-    "declarationMap": true,
-    "declarationDir": "./dist/types",
     "module": "node16",
     // Node.js 18 supports up to ES2022 according to https://www.npmjs.com/package/@tsconfig/node18
     "target": "es2022",