Object.extname is deprecated

[mrbbp]

Sorry, i reopen the issue, as i have the error in Atom with the following message

Argument to path.extname must be a string

Object.extname - /Applications/Atom.app/Contents/Resources/app.asar/src/electron-shims.js:20:10
Object.getEditor - /Users/xxx/.atom/packages/markdown-writer/lib/helpers/template-helper.coffee:99:30
InsertImageFileView.display - /Users/xxx.atom/packages/markdown-writer/lib/views/insert-image-file-view.coffee:192:41
InsertImage.trigger - /Users/xxx/.atom/packages/markdown-writer/lib/commands/insert-image.coffee:17:21
HTMLElement.<anonymous> - /Users/xxx/.atom/packages/markdown-writer/lib/markdown-writer.coffee:157:37
CommandRegistry.handleCommandEvent - <embedded>:11:349290

Atom 1.45.0 x64 osx 10.14.6
Electron 4.2.7
Chrome 69.0.3497.128
Node: 10.11.0
last version available of plugin. (uptodate)