feat(esm): add bundled export for esm

Author: Kent C. Dodds

.size-snapshot.json

@@ -1,7 +1,31 @@
 {
+  "dist/dom-testing-library.cjs.js": {
+    "bundled": 137666,
+    "minified": 59811,
+    "gzipped": 16554
+  },
+  "dist/dom-testing-library.umd.min.js": {
+    "bundled": 146462,
+    "minified": 53705,
+    "gzipped": 15876
+  },
   "dist/dom-testing-library.umd.js": {
-    "bundled": 146393,
-    "minified": 53662,
-    "gzipped": 15855
+    "bundled": 146462,
+    "minified": 53705,
+    "gzipped": 15876
+  },
+  "dist/dom-testing-library.esm.js": {
+    "bundled": 136297,
+    "minified": 58558,
+    "gzipped": 16321,
+    "treeshaked": {
+      "rollup": {
+        "code": 41502,
+        "import_statements": 0
+      },
+      "webpack": {
+        "code": 44070
+      }
+    }
   }
 }

package.json

@@ -3,6 +3,7 @@
   "version": "0.0.0-semantically-released",
   "description": "Simple and complete DOM testing utilities that encourage good testing practices.",
   "main": "dist/index.js",
+  "module": "dist/dom-testing-library.esm.js",
   "umd:main": "dist/dom-testing-library.umd.js",
   "source": "src/index.js",
   "typings": "typings",
@@ -24,7 +25,7 @@
   },
   "scripts": {
     "add-contributor": "kcd-scripts contributors add",
-    "build": "kcd-scripts build && kcd-scripts build --bundle umd --no-clean",
+    "build": "kcd-scripts build && kcd-scripts build --bundle --no-clean",
     "lint": "kcd-scripts lint",
     "test": "kcd-scripts test",
     "test:update": "npm test -- --updateSnapshot --coverage",