Revert some changes

Author: hsubox76

packages/database/exp/package.json

@@ -2,8 +2,8 @@
   "name": "@firebase/database-exp",
   "description": "A version of the Realtime Database SDK that is compatible with the tree-shakeable Firebase SDK",
   "main": "../dist/exp/index.node.cjs.js",
-  "browser": "../dist/exp/index.esm.js",
-  "module": "../dist/exp/index.esm.js",
-  "esm2017": "../dist/exp/index.esm2017.js",
+  "esm5": "../dist/exp/index.esm.js",
+  "browser": "../dist/exp/index.esm2017.js",
+  "module": "../dist/exp/index.esm2017.js",
   "typings": "../dist/exp/index.d.ts"
 }

scripts/exp/prepare-database-for-exp-release.ts

@@ -46,23 +46,19 @@ export async function prepare() {
 
   packageJson.main = expPackageJson.main.replace('../', '');
 
-  // Set esm2017 as default.
-  // Delete esm2017 field.
-  // Add esm5 field.
-  packageJson.module = expPackageJson.esm2017.replace('../', '');
-  packageJson.browser = expPackageJson.esm2017.replace('../', '');
-  delete packageJson.esm2017;
-  packageJson.esm5 = expPackageJson.browser.replace('../', '');
+  packageJson.module = expPackageJson.module.replace('../', '');
+  packageJson.browser = expPackageJson.browser.replace('../', '');
+  packageJson.esm5 = expPackageJson.esm5.replace('../', '');
 
   // Add exports field. These need to be relative paths so start with './';
   packageJson.exports = {
     main: expPackageJson.main.replace('../', './'),
     // Again, these are esm2017 now.
-    module: expPackageJson.esm2017.replace('../', './'),
-    browser: expPackageJson.esm2017.replace('../', './'),
-    esm5: expPackageJson.browser.replace('../', './'),
+    module: expPackageJson.module.replace('../', './'),
+    browser: expPackageJson.browser.replace('../', './'),
+    esm5: expPackageJson.esm5.replace('../', './'),
     node: expPackageJson.main.replace('../', './'),
-    default: expPackageJson.esm2017.replace('../', './')
+    default: expPackageJson.browser.replace('../', './')
   };
 
   packageJson.typings = expPackageJson.typings.replace('../', '');