Potential fix (resolves #1082)

lib/plugin/github/GitHub.js

@@ -127,6 +127,7 @@ class GitHub extends Release {
   }
 
   async release() {
+    const { assets } = this.options;
     const { isWeb, isUpdate } = this.getContext();
     const { isCI } = this.config;
 
@@ -138,7 +139,7 @@ class GitHub extends Release {
       return this.step({ task, label: 'Generating link to GitHub Release web interface', prompt: 'release' });
     } else if (isCI) {
       await this.step({ task: () => this[publishMethod](), label: `GitHub ${type} release` });
-      await this.step({ task: () => this.uploadAssets(), label: 'GitHub upload assets' });
+      await this.step({ enabled: assets, task: () => this.uploadAssets(), label: 'GitHub upload assets' });
       return this.step({
         task: () => (isUpdate ? Promise.resolve() : this.commentOnResolvedItems()),
         label: 'GitHub comment on resolved items'
@@ -147,7 +148,7 @@ class GitHub extends Release {
       const release = async () => {
         await this[publishMethod]();
         await this.uploadAssets();
-        return isUpdate ? Promise.resolve() : this.commentOnResolvedItems();
+        return isUpdate ? Promise.resolve(true) : this.commentOnResolvedItems();
       };
       return this.step({ task: release, label: `GitHub ${type} release`, prompt: 'release' });
     }
@@ -379,7 +380,7 @@ class GitHub extends Release {
     const { submit, issue, pr } = comments ?? {};
     const context = this.getContext();
 
-    if (!submit || !changelog) return;
+    if (!submit || !changelog) return true;
 
     const shas = getCommitsFromChangelog(changelog);
     const searchResults = await Promise.all(searchQueries(this.client, owner, repo, shas));
@@ -395,7 +396,7 @@ class GitHub extends Release {
 
       if (isDryRun) {
         this.log.exec(`octokit issues.createComment (${url})`, { isDryRun });
-        return;
+        return Promise.resolve();
       }
 
       try {