fix(firebasedatabase): update the API

src/apis/firebasedatabase/README.md

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+<img src="https://avatars0.githubusercontent.com/u/1342004?v=3&s=96" alt="Google Inc. logo" title="Google" align="right" height="96" width="96"/>
+
+# firebasedatabase
+
+> The Firebase Realtime Database Management API enables programmatic provisioning and management of Realtime Database instances.
+
+## Installation
+
+```sh
+$ npm install googleapis
+```
+
+## Usage
+All documentation and usage information can be found on [GitHub](https://github.com/googleapis/google-api-nodejs-client).
+
+## Building a browser bundle
+
+This library can be used in a browser. To prepare a single file bundle, clone the
+[repository](https://github.com/googleapis/google-api-nodejs-client) and run
+
+```sh
+$ cd src/apis/firebasedatabase
+$ npm install
+$ npm run webpack
+```
+
+The generated bundle will be written to `dist/firebasedatabase.min.js`. Use it from your HTML file:
+
+```html
+<script src="/path/to/firebasedatabase.min.js"></script>
+<script>
+const { firebasedatabase, auth } = Firebasedatabase;
+</script>
+```
+
+## License
+This library is licensed under Apache 2.0. Full license text is available in [LICENSE](https://github.com/googleapis/google-api-nodejs-client/blob/master/LICENSE).
+
+## Contributing
+We love contributions! Before submitting a Pull Request, it's always good to start with a new issue first. To learn more, see [CONTRIBUTING](https://github.com/google/google-api-nodejs-client/blob/master/.github/CONTRIBUTING.md).
+
+## Questions/problems?
+* Ask your development related questions on [StackOverflow](http://stackoverflow.com/questions/tagged/google-api-nodejs-client).
+* If you've found an bug/issue, please [file it on GitHub](https://github.com/googleapis/google-api-nodejs-client/issues).
+
+
+*Crafted with ❤️ by the Google Node.js team*

src/apis/firebasedatabase/index.ts

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+// 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.
+
+/*! THIS FILE IS AUTO-GENERATED */
+
+import {AuthPlus, getAPI, GoogleConfigurable} from 'googleapis-common';
+import {firebasedatabase_v1beta} from './v1beta';
+
+export const VERSIONS = {
+  v1beta: firebasedatabase_v1beta.Firebasedatabase,
+};
+
+export function firebasedatabase(
+  version: 'v1beta'
+): firebasedatabase_v1beta.Firebasedatabase;
+export function firebasedatabase(
+  options: firebasedatabase_v1beta.Options
+): firebasedatabase_v1beta.Firebasedatabase;
+export function firebasedatabase<T = firebasedatabase_v1beta.Firebasedatabase>(
+  this: GoogleConfigurable,
+  versionOrOptions: 'v1beta' | firebasedatabase_v1beta.Options
+) {
+  return getAPI<T>('firebasedatabase', versionOrOptions, VERSIONS, this);
+}
+
+const auth = new AuthPlus();
+export {auth};
+export {firebasedatabase_v1beta};
+export {
+  AuthPlus,
+  GlobalOptions,
+  APIRequestContext,
+  GoogleConfigurable,
+  StreamMethodOptions,
+  GaxiosPromise,
+  MethodOptions,
+  BodyResponseCallback,
+} from 'googleapis-common';

src/apis/firebasedatabase/package.json

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+{
+  "name": "@googleapis/firebasedatabase",
+  "version": "0.1.0",
+  "description": "firebasedatabase",
+  "main": "build/index.js",
+  "types": "build/index.d.ts",
+  "keywords": [
+    "google"
+  ],
+  "author": "Google LLC",
+  "license": "Apache-2.0",
+  "homepage": "https://github.com/googleapis/google-api-nodejs-client",
+  "bugs": {
+    "url": "https://github.com/googleapis/google-api-nodejs-client/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/googleapis/google-api-nodejs-client.git"
+  },
+  "engines": {
+    "node": ">=10.0.0"
+  },
+  "scripts": {
+    "fix": "gts fix",
+    "lint": "gts check",
+    "compile": "tsc -p .",
+    "prepare": "npm run compile",
+    "webpack": "webpack"
+  },
+  "dependencies": {
+    "googleapis-common": "^4.4.0"
+  },
+  "devDependencies": {
+    "@microsoft/api-documenter": "^7.8.10",
+    "@microsoft/api-extractor": "^7.8.10",
+    "gts": "^2.0.0",
+    "null-loader": "^4.0.0",
+    "ts-loader": "^8.0.0",
+    "typescript": "~3.7.0",
+    "webpack": "^5.0.0",
+    "webpack-cli": "^4.0.0"
+  }
+}

src/apis/firebasedatabase/tsconfig.json

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+{
+  "extends": "./node_modules/gts/tsconfig-google.json",
+  "compilerOptions": {
+    "rootDir": ".",
+    "outDir": "build"
+  },
+  "include": [
+    "*.ts",
+  ]
+}