Add support of review_requested event

src/main/java/org/kohsuke/github/GHIssueEvent.java

@@ -22,6 +22,8 @@ public class GHIssueEvent extends GitHubInteractiveObject {
     private GHLabel label;
     private GHUser assignee;
     private GHIssueRename rename;
+    private GHUser reviewRequester;
+    private GHUser requestedReviewer;
 
     private GHIssue issue;
 
@@ -155,6 +157,38 @@ public GHIssueRename getRename() {
         return this.rename;
     }
 
+    /**
+     *
+     * Get the {@link GHUser} person who requested a review. Only present for events "review_requested",
+     * "review_request_removed", <code>null</code> otherwise.
+     *
+     * @return the GHUser
+     *
+     * @see <a href=
+     *      "https://docs.github.com/en/developers/webhooks-and-events/events/issue-event-types#review_requested">review_requested</a>
+     *      and <a href=
+     *      "https://docs.github.com/en/developers/webhooks-and-events/events/issue-event-types#review_request_removed">review_request_removed</a>
+     */
+    public GHUser getReviewRequester() {
+        return this.reviewRequester;
+    }
+
+    /**
+     *
+     * Get the {@link GHUser} person requested to review the pull request. Only present for events "review_requested",
+     * "review_request_removed", <code>null</code> otherwise.
+     *
+     * @return the GHUser
+     *
+     * @see <a href=
+     *      "https://docs.github.com/en/developers/webhooks-and-events/events/issue-event-types#review_requested">review_requested</a>
+     *      and <a href=
+     *      "https://docs.github.com/en/developers/webhooks-and-events/events/issue-event-types#review_request_removed">review_request_removed</a>
+     */
+    public GHUser getRequestedReviewer() {
+        return this.requestedReviewer;
+    }
+
     GHIssueEvent wrapUp(GitHub root) {
         this.root = root;
         return this;

src/test/java/org/kohsuke/github/GHIssueEventTest.java

@@ -3,6 +3,7 @@
 import org.junit.Test;
 
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.List;
 
 import static org.hamcrest.Matchers.*;
@@ -39,6 +40,31 @@ public void testEventsForSingleIssue() throws Exception {
         issue.close();
     }
 
+    @Test
+    public void testIssueReviewRequestedEvent() throws Exception {
+        // Create the PR.
+        final GHPullRequest pullRequest = getRepository()
+                .createPullRequest("ReviewRequestedEventTest", "test/stable", "main", "## test");
+
+        final ArrayList<GHUser> reviewers = new ArrayList<>();
+        reviewers.add(gitHub.getUser("bitwiseman"));
+        // Generate review_requested event.
+        pullRequest.requestReviewers(reviewers);
+
+        // Test that the event is present.
+        final List<GHIssueEvent> list = pullRequest.listEvents().toList();
+        assertThat(list.size(), equalTo(1));
+        final GHIssueEvent event = list.get(0);
+        assertThat(event.getEvent(), equalTo("review_requested"));
+        assertThat(event.getReviewRequester(), notNullValue());
+        assertThat(event.getReviewRequester().getLogin(), equalTo("t0m4uk1991"));
+        assertThat(event.getRequestedReviewer(), notNullValue());
+        assertThat(event.getRequestedReviewer().getLogin(), equalTo("bitwiseman"));
+
+        // Close the PR.
+        pullRequest.close();
+    }
+
     @Test
     public void testEventsForIssueRename() throws Exception {
         // Create the issue.

src/test/resources/org/kohsuke/github/GHIssueEventTest/wiremock/testIssueReviewRequestedEvent/__files/orgs_hub4j-test-org-2.json

@@ -0,0 +1,50 @@
+{
+  "login": "hub4j-test-org",
+  "id": 7544739,
+  "node_id": "MDEyOk9yZ2FuaXphdGlvbjc1NDQ3Mzk=",
+  "url": "https://api.github.com/orgs/hub4j-test-org",
+  "repos_url": "https://api.github.com/orgs/hub4j-test-org/repos",
+  "events_url": "https://api.github.com/orgs/hub4j-test-org/events",
+  "hooks_url": "https://api.github.com/orgs/hub4j-test-org/hooks",
+  "issues_url": "https://api.github.com/orgs/hub4j-test-org/issues",
+  "members_url": "https://api.github.com/orgs/hub4j-test-org/members{/member}",
+  "public_members_url": "https://api.github.com/orgs/hub4j-test-org/public_members{/member}",
+  "avatar_url": "https://avatars.githubusercontent.com/u/7544739?v=4",
+  "description": "Hub4j Test Org Description (this could be null or blank too)",
+  "name": "Hub4j Test Org Name (this could be null or blank too)",
+  "company": null,
+  "blog": "https://hub4j.url.io/could/be/null",
+  "location": "Hub4j Test Org Location (this could be null or blank too)",
+  "email": "hub4jtestorgemail@could.be.null.com",
+  "twitter_username": null,
+  "is_verified": false,
+  "has_organization_projects": true,
+  "has_repository_projects": true,
+  "public_repos": 19,
+  "public_gists": 0,
+  "followers": 0,
+  "following": 0,
+  "html_url": "https://github.com/hub4j-test-org",
+  "created_at": "2014-05-10T19:39:11Z",
+  "updated_at": "2020-06-04T05:56:10Z",
+  "type": "Organization",
+  "total_private_repos": 2,
+  "owned_private_repos": 2,
+  "private_gists": 0,
+  "disk_usage": 11979,
+  "collaborators": 0,
+  "billing_email": "kk@kohsuke.org",
+  "default_repository_permission": "none",
+  "members_can_create_repositories": false,
+  "two_factor_requirement_enabled": false,
+  "members_can_create_pages": true,
+  "members_can_create_public_pages": true,
+  "members_can_create_private_pages": true,
+  "plan": {
+    "name": "free",
+    "space": 976562499,
+    "private_repos": 10000,
+    "filled_seats": 26,
+    "seats": 3
+  }
+}