Remove --harmony JavaScript flag

Merge pull request atom#12985 from atom/ns-fix-keymap-ctrl-issue

Fix keystroke resolution problems on Linux

⬆️ atom-keymap

Fixes atom#12958

Merge pull request atom#12977 from atom/ns-dont-share-overlay-dimensions

Don't share overlayDimensions across instances

⬆️ atom-keymap

Closes atom#12980

Extract signed exe's from nuget-full for portable

1.12.0-beta0

1.11.1

Merge pull request atom#12925 from atom/as-fix-ci-failure

Return a `Disposable` when stubbing `observePreferredScrollbarStyle`

⬆️ settings-view