Add mocha.opts to check for a few rare bugs

This was added preemptively--this wasn't because of any issue with Helmet.
helmetjs · Oct 4, 2018 · 0468c37 · 0468c37
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commit 0468c37
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/test/mocha.opts b/test/mocha.opts
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+--check-leaks --exit --throw-deprecation --forbid-only --forbid-pending