Stop bundling dependencies, UMD file

Allow users' package managers to satisfy our dependencies,
instead of bundling them all in our compiled output.

(this is like dynamic linking as opposed to static linking for JS)

Author: EzraBrooks

package-lock.json

@@ -7,12 +7,10 @@
   "files": [
     "dist"
   ],
-  "main": "./dist/RosLib.umd.cjs",
   "module": "./dist/RosLib.js",
   "exports": {
     ".": {
-      "import": "./dist/RosLib.js",
-      "require": "./dist/RosLib.umd.cjs"
+      "import": "./dist/RosLib.js"
     }
   },
   "type": "module",
@@ -36,6 +34,7 @@
     "vite": "^7.0.0",
     "vite-plugin-checker": "^0.11.0",
     "vite-plugin-dts": "^4.0.2",
+    "vite-plugin-externalize-deps": "^0.10.0",
     "vitest": "^4.0.3",
     "vitest-fail-on-console": "^0.10.1"
   },

package.json

@@ -2,6 +2,7 @@ import { resolve } from "path";
 import { defineConfig } from "vitest/config";
 import dts from "vite-plugin-dts";
 import checker from "vite-plugin-checker";
+import { externalizeDeps } from "vite-plugin-externalize-deps";
 
 export default defineConfig({
   plugins: [
@@ -20,6 +21,7 @@ export default defineConfig({
         useFlatConfig: true,
       },
     }),
+    externalizeDeps(),
   ],
   build: {
     lib: {
@@ -28,16 +30,7 @@ export default defineConfig({
       name: "ROSLIB",
       // the proper extensions will be added
       fileName: "RosLib",
-    },
-    rollupOptions: {
-      /*
-       * make sure to externalize deps that shouldn't be bundled
-       * into your library
-       */
-      external: ["eventemitter3", "ws", "src/util/decompressPng.js"],
-      output: {
-        globals: { eventemitter3: "EventEmitter3" },
-      },
+      formats: ["es"],
     },
     // Keep synchronized with minimum engine specified in CI & package.json
     target: "node18",