Update import path and version number

Changed the relative import path in `register.ts` for better module resolution and incremented the package version to 0.0.4 to reflect the updated changes.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ts-injex",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "description": "",
   "type": "module",
   "main": "./dist/index.js",

src/functions/register.ts

@@ -1,4 +1,4 @@
-import { TSInjex } from 'src/TSInjex';
+import { TSInjex } from '../TSInjex';
 
 /**
  * Register a dependency.