Merge pull request #201 from microsoft/fix-esm

Add Node-specific export condition for ESM entrypoint that re-exports CJS

Author: andrewbranch

package.json

@@ -28,8 +28,17 @@
     "sideEffects": false,
     "exports": {
         ".": {
-            "module": "./tslib.es6.js",
-            "import": "./modules/index.js",
+            "module": {
+              "types": "./tslib.d.ts",
+              "default": "./tslib.es6.js"
+            },
+            "import": {
+              "node": "./modules/index.js",
+              "default": {
+                "types": "./tslib.d.ts",
+                "default": "./tslib.es6.js"
+              }
+            },
             "default": "./tslib.js"
         },
         "./*": "./*",