Update submodule 'history-substring-search'

history-substring-search doesn't tag releases anymore and just maintains the master branch -- switching to tracking master instead.
mezuzza · Oct 12, 2018 · 58809b2 · 58809b2
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commit 58809b2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/modules/history-substring-search/external b/modules/history-substring-search/external