add sourcemaps

Author: NiloCK

packages/db/tsconfig.json

@@ -14,6 +14,10 @@
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "noFallthroughCasesInSwitch": true,
+    "sourceMap": true,
+    "inlineSources": true,
+    "declaration": true,
+    "declarationMap": true,
     "paths": {
       "@/*": ["./src/*"]
     }