Add UMD output

Author: beachtom

package.json

@@ -46,10 +46,11 @@
     "copy-debug-to-dist": "make-dir dist && cpy \"src/wasm/build_debug/*.js\" dist &&  cpy \"src/wasm/build_debug/*.wasm\" dist ",
     "build-wasm-debug": "make-dir src/wasm/build_debug && cd src/wasm/build_debug && emcmake cmake .. -DEMSCRIPTEN=true -DCMAKE_BUILD_TYPE=Debug && emmake make && npm run copy-debug-to-dist",
     "build-wasm-release": "make-dir src/wasm/build && cd src/wasm/build && emcmake cmake .. -DEMSCRIPTEN=true -DCMAKE_BUILD_TYPE=Release && emmake make && npm run copy-to-dist",
-    "build-api": "make-dir dist/helpers && npm run build-ts-api && npm run build-web-ifc-api-browser && npm run build-web-ifc-api-node && cpy README.md dist && cpy package.json dist",
+    "build-api": "make-dir dist/helpers && npm run build-ts-api && npm run build-web-ifc-api-browser && npm run build-web-ifc-api-node && npm run build-web-ifc-api-umd &&cpy README.md dist && cpy package.json dist",
     "build-ts-api": "make-dir dist/helpers && cpy \"src/*.ts\" dist && cpy \"src/helpers/*\" dist/helpers --flat && tsc  --incremental --emitDeclarationOnly && cpy dist/web-ifc-api.d.ts . --rename=web-ifc-api-node.d.ts",
     "build-web-ifc-api-node": "make-dir dist && esbuild dist/web-ifc-api.ts --bundle --format=esm --external:path --define:__WASM_PATH__=\\\"./web-ifc-node\\\" --external:fs --external:os --external:perf_hooks --outfile=./dist/web-ifc-api-node.mjs && esbuild dist/web-ifc-api.ts --define:__WASM_PATH__=\\\"./web-ifc-node\\\" --bundle --platform=node --outfile=./dist/web-ifc-api-node.js",
     "build-web-ifc-api-browser": "make-dir dist && esbuild dist/web-ifc-api.ts --bundle --format=esm --define:__WASM_PATH__=\\\"./web-ifc\\\" --outfile=./dist/web-ifc-api.js",
+    "build-web-ifc-api-umd": "make-dir dist && esbuild dist/web-ifc-api.ts --bundle --format=iife --define:__WASM_PATH__=\\\"./web-ifc\\\" --outfile=./dist/web-ifc-api-umd.js",
     "build-viewer": "cd examples/viewer/ && npm run build",
     "serve-viewer": "npm run build-viewer && cd examples/viewer/ && npm run start",
     "dev": "npm run build-viewer && concurrently --kill-others \"npm-watch\" \"cd examples/viewer && npm run start\"",