Добавил пропущенный install

Author: khorevaa

.travis.yml

@@ -18,7 +18,7 @@ before_install:
   - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
   - echo "deb http://download.mono-project.com/repo/ubuntu xenial main" | sudo tee /etc/apt/sources.list.d/mono-official.list
   - sudo apt-get update
-  - sudo apt-get mono-complete ca-certificates-mono libmono-i18n4.0-all mono-runtime mono-mcs
+  - sudo apt-get install mono-devel mono-complete ca-certificates-mono libmono-i18n4.0-all mono-runtime mono-mcs
   - sudo dpkg -i os.deb; sudo apt install -f
   - sudo oscript /usr/share/oscript/lib/opm/src/opm.os install opm
   - oscript