Create shorter temp path for Squirrel

temporarily disable tests

Merge pull request atom#15183 from atom/jr-is-there-anything-a-middle…

…-click-CANT-do

Fix regression re: closing tabs via middle mouse click on Linux

⬆️ github@0.3.4-0

Merge pull request atom#15135 from atom/js-ns-fix-gutter-layout

Fix gutter decoration regression in v1.19 beta

Sign update.exe before Squirrel copies it.

Merge pull request atom#15011 from mehcode/gutter-marker-layer-bug

Check if incoming element is non-null before attempting to append to it

⬆️ metrics

Merge pull request atom#14893 from atom/as-fix-resetting-node-pool-st…

…yles

Fix resetting styles in NodePool

1.19.0-beta1