make errors getting issues non-fatal

This can happen if someone moves a repo between the previous merge and then a release. The Issue number is the only thing that is used to get issue details but really the full path should be used (if at all possible). This change just prevents this situation from causing an unrecoverable error

src/changelog.ts

@@ -169,8 +169,12 @@ export default class Changelog {
     await pMap(
       commitInfos,
       async (commitInfo: CommitInfo) => {
-        if (commitInfo.issueNumber) {
-          commitInfo.githubIssue = await this.github.getIssueData(this.config.repo, commitInfo.issueNumber);
+        try {
+          if (commitInfo.issueNumber) {
+            commitInfo.githubIssue = await this.github.getIssueData(this.config.repo, commitInfo.issueNumber);
+          }
+        } catch (err: any) {
+          console.error(`Error getting issue data: ${err.message}`);
         }
 
         progressBar.tick();

src/github-api.ts

@@ -65,7 +65,12 @@ export default class GithubAPI {
     if (res.ok) {
       return parsedResponse;
     }
-    throw new ConfigurationError(`Fetch error: ${res.statusText}.\n${JSON.stringify(parsedResponse)}`);
+
+    if (res.status === 404) {
+      throw new ConfigurationError(`Not Found [${url}]`);
+    }
+
+    throw new ConfigurationError(`Fetch error [${url}]: ${res.statusText}.\n${JSON.stringify(parsedResponse)}`);
   }
 
   private getAuthToken(): string {