Revert "Upgrade space-pen now that problem with 3.2.4 is fixed"

This reverts commit 7dcafb4.

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Upgrade to apm 0.68

Merge pull request atom#2431 from atom/cj-add-tokenized-event

Use tokenized event to determine tab style

Upgrade to atom-keymap 0.23.0

Merge branch 'cj-paragraph-test'

Add scrolling benchmark to React editor

Add missing parens on indent guide check

Previously the indent guide was always showing on the whitespace only lines

Closes atom#2274

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Resolve path to apm

Refs atom#1936