Changed Travis build distro to focal

Author: tumic0

.travis.yml

@@ -1,5 +1,5 @@
 language: c++
-dist: xenial
+dist: focal
 
 os:
   - linux
@@ -13,7 +13,7 @@ before_install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
 
 install:
-#  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install qt protobuf; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install qt protobuf; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install qtbase5-dev qtbase5-dev-tools qt5-qmake libprotobuf-dev protobuf-compiler; fi
 
 script: