Update gitignore

Author: n1xan

.gitignore

@@ -3,6 +3,9 @@
 ##
 ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore
 
+# macOS
+.DS_Store
+
 # User-specific files
 *.rsuser
 *.suo
@@ -131,6 +134,10 @@ _ReSharper*/
 *.[Rr]e[Ss]harper
 *.DotSettings.user
 
+# JetBrains Rider
+.idea/
+*.sln.iml
+
 # TeamCity is a build add-in
 _TeamCity*