setup unbuild to inline replace __PACKAGE_VERSION with the current release version

Author: nsdeschenes

packages/bundler-plugin-core/build.config.ts

@@ -1,4 +1,5 @@
 import { defineBuildConfig } from "unbuild";
+import packageJson from "./package.json";
 
 export default defineBuildConfig({
   entries: ["./src/index"],
@@ -10,5 +11,11 @@ export default defineBuildConfig({
     esbuild: {
       minify: true,
     },
+    replace: {
+      preventAssignment: true,
+      values: {
+        __PACKAGE_VERSION__: JSON.stringify(packageJson.version),
+      },
+    },
   },
 });