Update .travis.yml

.travis.yml

@@ -1,10 +1,9 @@
 # Tests
 # Verify the install script
 
-# minimal = sh
 os: linux
 dist: bionic
-language: minimal
+language: shell
 
 git:
   depth: 3
@@ -15,16 +14,18 @@ branches:
 #    - master
     - themify
 
-before_install::
+before_install:
+ - sudo apt-key adv --keyserver keyring.debian.org --recv-keys 04EE7237B7D453EC
+ - sudo apt-key adv --keyserver keyring.debian.org --recv-keys 648ACFD622F3D138
  - sudo add-apt-repository -y "deb http://ftp.us.debian.org/debian bullseye main"
- - sudo apt-get update -y
+ - sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse"
+ - sudo apt-get update -qq -y
  - sudo apt-get install -y nano_4.5-1_amd64.deb
  - nano --version
  - shellcheck --version
 
 # Add unstable repos for the last version of nano
 #  - sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse"
-#  - sudo apt-get update -qq -y
 #  - sudo apt-get install -qq -y shellcheck
 
 # script: ./tests.sh