Update @octokit/rest to the latest version 🚀 (material-components#4100)

The devDependency [@octokit/rest](https://github.com/octokit/rest.js) was updated from `15.9.4` to `16.1.0`.

package.json

@@ -42,7 +42,7 @@
   },
   "devDependencies": {
     "@google-cloud/datastore": "^2.0.0",
-    "@octokit/rest": "^15.9.4",
+    "@octokit/rest": "^16.1.0",
     "argparse": "^1.0.10",
     "ascii-table": "0.0.9",
     "autoprefixer": "^9.0.0",

test/screenshot/infra/lib/github-api.js

@@ -138,7 +138,7 @@ class GitHubApi {
 
     try {
       stackTrace = getStackTrace('getPullRequestNumber');
-      allPrsResponse = await this.octokit_.pullRequests.getAll({
+      allPrsResponse = await this.octokit_.pulls.list({
         owner: 'material-components',
         repo: 'material-components-web',
         per_page: 100,
@@ -163,7 +163,7 @@ class GitHubApi {
 
     try {
       stackTrace = getStackTrace('getPullRequestBaseBranch');
-      prResponse = await this.octokit_.pullRequests.get({
+      prResponse = await this.octokit_.pulls.get({
         owner: 'material-components',
         repo: 'material-components-web',
         number: prNumber,