Introduce an option to use the GitHub API to commit changes, for GPG (#391)

* Create tags on GitHub using API

To allow for signed tags to be created,
rather than use the git CLI to push tags,
manually push each tag using the GitHub API,
which will sign the tag using the built-in GitHub GPG key.

* Use ghcommit to push changes

To allow for all commits to be signed,
use the GitHub API to push changes.

* Add changeset version

* Allow tag publish to fail, assume it was manually published

* Add to changeset

* Update @s0/ghcommit

* Update ghcommit to fix missing ref bug

* Make using GitHub API Optional

Change this to a minor version bump,
with a new feature that allows for using the
GitHub API to create tags and commits.

* Use a strategy pattern for GitHub API vs CLI usage

* refactor git interactions

* fix mock thing

* usechangesets pkg

* switch to `commitMode`

---------

Co-authored-by: Mateusz Burzyński <mateuszburzynski@gmail.com>

src/octokit.ts

@@ -0,0 +1,39 @@
+import * as core from "@actions/core";
+import { GitHub, getOctokitOptions } from "@actions/github/lib/utils";
+import { throttling } from "@octokit/plugin-throttling";
+
+export const setupOctokit = (githubToken: string) => {
+  return new (GitHub.plugin(throttling))(
+    getOctokitOptions(githubToken, {
+      throttle: {
+        onRateLimit: (retryAfter, options: any, octokit, retryCount) => {
+          core.warning(
+            `Request quota exhausted for request ${options.method} ${options.url}`
+          );
+
+          if (retryCount <= 2) {
+            core.info(`Retrying after ${retryAfter} seconds!`);
+            return true;
+          }
+        },
+        onSecondaryRateLimit: (
+          retryAfter,
+          options: any,
+          octokit,
+          retryCount
+        ) => {
+          core.warning(
+            `SecondaryRateLimit detected for request ${options.method} ${options.url}`
+          );
+
+          if (retryCount <= 2) {
+            core.info(`Retrying after ${retryAfter} seconds!`);
+            return true;
+          }
+        },
+      },
+    })
+  );
+};
+
+export type Octokit = ReturnType<typeof setupOctokit>;