do not abort on error for exp build

Author: Feiyang1

packages-exp/firebase-exp/database/index.ts

@@ -1 +1,18 @@
-export * from '@firebase/database';
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export * from '@firebase/database';

packages/database/rollup.config.exp.js

@@ -33,6 +33,7 @@ const deps = Object.keys(
 const es5BuildPlugins = [
   typescriptPlugin({
     typescript,
+    abortOnError: false,
     transformers: [importPathTransformer]
   }),
   json()
@@ -74,6 +75,7 @@ const es2017BuildPlugins = [
         target: 'es2017'
       }
     },
+    abortOnError: false,
     transformers: [importPathTransformer]
   }),
   json({ preferConst: true })

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

@@ -51,10 +51,7 @@ export async function prepare() {
   packageJson.typings = expPackageJson.typings.replace('../', '');
 
   // include files to be published
-  packageJson.files = [
-    ...packageJson.files,
-    packageJson.typings
-  ];
+  packageJson.files = [...packageJson.files, packageJson.typings];
 
   // update package.json files
   await writeFile(