Evidently travis respects sudo now

Author: tilkinsc

Diff for: .travis.yml

@@ -16,8 +16,8 @@ branches:
     - master
 
 before_install:
-  - apt update
-  - apt install libgnutls-openssl27 libgnutls30
+  - sudo apt update
+  - sudo apt install libgnutls-openssl27 libgnutls30
 
 before_script:
   - chmod +x travis.linux.sh