Update to QMod format 2.2.1

Author: ComputerElite

QuestAppVersionSwitcher/Mods/QPMod.cs

@@ -342,6 +342,11 @@ private async Task PrepareDependency(Dependency dependency, List<string> install
                     throw new InstallationException($"Dependency with ID {dependency.Id} is already installed but with an incorrect version ({existing.Version} does not intersect {dependency.VersionRange}). Upgrading was not possible as there was no download link provided");
                 }
             }
+            else if (!dependency.Required)
+            {
+                // Dependency is optional so we can stop here since there is no existing install.
+                return;
+            }
             else if (dependency.DownloadUrlString == null)
             {
                 throw new InstallationException($"Dependency {dependency.Id} is not installed, and the mod depending on it does not specify a download path if missing");

QuestAppVersionSwitcher/QuestAppVersionSwitcher.csproj

@@ -241,7 +241,7 @@
       <Version>1.0.2</Version>
     </PackageReference>
     <PackageReference Include="QuestPatcher.QMod">
-      <Version>2.1.0</Version>
+      <Version>2.2.1</Version>
     </PackageReference>
     <PackageReference Include="QuestPatcher.Zip">
       <Version>1.1.1</Version>