docs: update list of available APIs. (#2973)

README.md

@@ -13,6 +13,7 @@ applications that interact with individual Google Cloud services:
 | [AutoML](https://github.com/googleapis/nodejs-automl) | [:notebook:](https://googleapis.dev/nodejs/automl/latest) | `npm i @google-cloud/automl` | [enable](https://console.cloud.google.com/flows/enableapi?apiid=automl.googleapis.com) | ✖ |
 | [BigQuery](https://github.com/googleapis/nodejs-bigquery) | [:notebook:](https://googleapis.dev/nodejs/bigquery/latest) | `npm i @google-cloud/bigquery` | [enable](https://console.cloud.google.com/flows/enableapi?apiid=bigquery.googleapis.com) | ✔ |
 | [Bigtable](https://github.com/googleapis/nodejs-bigtable) | [:notebook:](https://googleapis.dev/nodejs/bigtable/latest) | `npm i @google-cloud/bigtable` | [enable](https://console.cloud.google.com/flows/enableapi?apiid=bigtable.googleapis.com) | ✖ |
+| [Billing](https://github.com/googleapis/nodejs-billing) | [:notebook:](https://googleapis.dev/nodejs/billing/latest/index.html) | `npm i @google-cloud/billing` | [enable](https://console.cloud.google.com/flows/enableapi?apiid=cloudbilling.googleapis.com) | ✖ |
 | [Billing Budgets](https://github.com/googleapis/nodejs-billing-budgets) | [:notebook:](https://googleapis.dev/nodejs/billingbudgets/latest/index.html) | `npm i @google-cloud/billing-budgets` | [enable](https://console.cloud.google.com/flows/enableapi?apiid=billingbudgets.googleapis.com) | ✖ |
 | [Build](https://github.com/googleapis/nodejs-cloudbuild) | [:notebook:](https://googleapis.dev/nodejs/cloudbuild/latest/index.html) | `npm i @google-cloud/cloudbuild` | [enable](https://console.cloud.google.com/flows/enableapi?apiid=cloudbuild.googleapis.com) | ✖ |
 | [Data Catalog](https://github.com/googleapis/nodejs-datacatalog) | [:notebook:](https://googleapis.dev/nodejs/datacatalog/latest) | `npm i @google-cloud/datacatalog` | [enable](https://console.cloud.google.com/flows/enableapi?apiid=datacatalog.googleapis.com) | ✖ |

synth.metadata

@@ -1,3 +1,3 @@
 {
-  "updateTime": "2020-02-26T12:10:29.776478Z"
+  "updateTime": "2020-02-29T12:10:11.341682Z"
 }