Improve error messages on GitHub API errors (#199)

Fixes: #198

src/download/download-version.ts

@@ -158,6 +158,12 @@ async function getReleaseTagNames(
     owner: OWNER,
     repo: REPO,
   });
+  const releaseTagNames = response.map((release) => release.tag_name);
+  if (releaseTagNames.length === 0) {
+    throw Error(
+      "Github API request failed while getting releases. Check the GitHub status page for outages. Try again later.",
+    );
+  }
   return response.map((release) => release.tag_name);
 }
 
@@ -177,6 +183,9 @@ async function getLatestVersion(githubToken: string) {
       const octokit = new PaginatingOctokit();
       latestRelease = await getLatestRelease(octokit);
     } else {
+      core.error(
+        "Github API request failed while getting latest release. Check the GitHub status page for outages. Try again later.",
+      );
       throw err;
     }
   }