chore: mark typescript package as tree shakeable

typescript/package.json

@@ -1,12 +1,27 @@
 {
   "name": "@peoplesgrocers/lseq",
-  "version": "0.99.1",
+  "version": "0.99.2",
   "description": "L-SEQ algorithm implementation for fractional indexing and list CRDTs",
-  "main": "dist/index.js",
+  "sideEffects": false,
+  "type": "module",
+  "main": "dist/index.cjs",
+  "module": "dist/index.js",
   "types": "dist/index.d.ts",
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./dist/index.d.ts",
+        "default": "./dist/index.js"
+      },
+      "require": {
+        "types": "./dist/index.d.cts",
+        "default": "./dist/index.cjs"
+      }
+    }
+  },
   "homepage": "https://peoplesgrocers.com/code/oss/lseq",
   "scripts": {
-    "build": "tsc",
+    "build": "tsup src/index.ts --format cjs,esm --dts",
     "test": "uvu -r tsx src \\.test\\.ts$",
     "prepublishOnly": "npm run build"
   },
@@ -23,9 +38,10 @@
   ],
   "license": "AGPL-3.0",
   "devDependencies": {
+    "tsup": "^8.5.1",
+    "tsx": "^4.7.0",
     "typescript": "^5.0.0",
-    "uvu": "^0.5.6",
-    "tsx": "^4.7.0"
+    "uvu": "^0.5.6"
   },
   "files": [
     "dist/**/*",
@@ -40,4 +56,4 @@
   "publishConfig": {
     "access": "public"
   }
-} 
+}