travis: install openssl explicitly

ethomson · ethomson · commit 844e85f21d22 · 2017-06-12T20:00:21.000+01:00
diff --git a/script/install-deps-osx.sh b/script/install-deps-osx.sh
@@ -5,4 +5,5 @@ set -x
 brew update
 brew install homebrew/dupes/zlib
 brew install curl
+brew install openssl
 brew install libssh2
