Fix .DS_Store macOS file not ignored (#37)

The .gitignore file doesn't exclude `.DS_Store` files because it checks for a directory instead of a file.
Removing the `/` at the end solves this issue.

Author: wborn

.gitignore

@@ -17,7 +17,7 @@ bin-release/
 .vscode/
 .idea/
 .local/
-.DS_*/
+.DS_*
 
 # File extensions
 *.apk