[Assembly] Update version to 1.2.0.

Author: Aleksbgbg

YouTube Downloader/Properties/AssemblyInfo.cs

@@ -12,5 +12,5 @@
 [assembly: AssemblyCulture("")]
 [assembly: ComVisible(false)]
 [assembly: ThemeInfo(ResourceDictionaryLocation.None, ResourceDictionaryLocation.SourceAssembly)]
-[assembly: AssemblyVersion("1.1.1.1")]
-[assembly: AssemblyFileVersion("1.1.1.1")]
+[assembly: AssemblyVersion("1.2.0")]
+[assembly: AssemblyFileVersion("1.2.0")]