build: enable inlineSources option in TS config

To prevent various reference errors to non-existent TS files when consuming the package we have to enable source map inlining. This option allows the TS source code to be inlined into the generated sourcemap.

tsconfig.json

@@ -8,6 +8,7 @@
     "rootDir": "./src",
     "strict": true,
     "sourceMap": true,
+    "inlineSources": true,
     "removeComments": false,
     "esModuleInterop": true,
     "experimentalDecorators": true,