travis: Use apt-get instead apt

It appears 'apt' is no longer available and the official documentation only mentions apt-get.
2019-07-19 14:51:42 +02:00 · 2019-07-19 14:51:42 +02:00 · 346a86dae0
parent 68e14bd897
commit 346a86dae0
1 changed files with 1 additions and 1 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -15,7 +15,7 @@ before_install:
  - wget https://services.gradle.org/distributions/gradle-${GRADLE_VERSION}-all.zip
  - unzip -q gradle-${GRADLE_VERSION}-all.zip
  - export PATH="$(pwd)/gradle-${GRADLE_VERSION}/bin:$PATH"
-  - sudo apt install graphviz
+  - sudo apt-get install graphviz

 install: gradle assemble --stacktrace