test: comment out broken tests in Safari 10 (#869)
test: comment out broken tests in Safari 10 (#869)

Three tests on the `should` interface are failing in Safari 10 due to a
bug related to proxies. These tests should be re-enabled once the bug is
fixed. See https://github.com/chaijs/chai/issues/855.
chaijs/chai,meeber/chai,lucasfcosta/chai,lucasfcosta/chai,meeber/chai,chaijs/chai