Fix travis R tests (#4277)

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Rory Mitchell 2019-03-20 12:56:04 +13:00 committed by GitHub
parent 359ed9c5bc
commit 7814183199
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@ -70,6 +70,8 @@ addons:
packages:
- gcc@7
- graphviz
- openssl
- libgit2
update: true
before_install: