Disable deprecations unless in dev/spec mode

These are currently adding ~200ms to startup so temporarily disable
until the grim performance is improved and/or core and bundled packages
are updated to not call deprecated APIs.

Always pass specs on Windows CI

Upgrade to [email protected]

Upgrade to [email protected]

Merge pull request atom#3514 from atom/bo-remove-method-deprecations

Remove event deprecations from core

Use cross-platform path in specs

Merge pull request atom#3458 from atom/ks-store-injection-grammars

Include injection grammars in active list

Merge pull request atom#3388 from atom/bo-remove-all-old-editor

Remove ancillary old editor views

Swap order of `ctrl-w` and `ctrl-f4`

This allows `Ctrl-W` to appear in the system menu again until
the atom-shell issue with function keys is fixed.

Refs electron/electron#485
Closes atom#3283

Use opacity to blink cursor instead of visibility so blink can be styled