docs: document the release schedule we follow (#454)

googleapis/synthtool@6a17abc
commit 6a17abc7652e2fe563e1288c6e8c23fc260dda97
Author: Benjamin E. Coe <bencoe@google.com>
Date:   Mon Mar 23 19:22:34 2020 -0700

    docs: document the release schedule we follow (#454)

README.md

@@ -162,6 +162,27 @@ has instructions for running the samples.
 The [Google Cloud BigQuery Node.js Client API Reference][client-docs] documentation
 also contains samples.
 
+## Supported Node.js Versions
+
+Our client libraries follow the [Node.js release schedule](https://nodejs.org/en/about/releases/).
+Libraries are compatible with all current _active_ and _maintenance_ versions of
+Node.js.
+
+Client libraries targetting some end-of-life versions of Node.js are available, and
+can be installed via npm [dist-tags](https://docs.npmjs.com/cli/dist-tag).
+The dist-tags follow the naming convention `legacy-(version)`.
+
+_Legacy Node.js versions are supported as a best effort:_
+
+* Legacy versions will not be tested in continuous integration.
+* Some security patches may not be able to be backported.
+* Dependencies will not be kept up-to-date, and features will not be backported.
+
+#### Legacy tags available
+
+* `legacy-8`: install client libraries from this dist-tag for versions
+  compatible with Node.js 8.
+
 ## Versioning
 
 This library follows [Semantic Versioning](http://semver.org/).

synth.metadata

@@ -1,11 +1,12 @@
 {
-  "updateTime": "2020-04-01T11:26:57.414131Z",
+  "updateTime": "2020-04-01T11:28:15.208868Z",
   "sources": [
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "7e98e1609c91082f4eeb63b530c6468aefd18cfd"
+        "sha": "6a17abc7652e2fe563e1288c6e8c23fc260dda97",
+        "log": "6a17abc7652e2fe563e1288c6e8c23fc260dda97\ndocs: document the release schedule we follow (#454)\n\n\n"
       }
     }
   ]