fix travis

Author: erossignon

.travis.yml

@@ -1,7 +1,6 @@
 language: cpp
 # 18.04
-dist: 
-  - bionic
+dist: bionic
 #  - focal
 
 os:
@@ -44,10 +43,13 @@ matrix:
   # env: TRAVIS_NODE_VERSION="7" ARCH="x86"
   allow_failures:
     - os: osx
+
 addons:
   apt:
     sources:
-      sourceline: - ubuntu-toolchain-r-test
+      - sourceline: 'ppa:ubuntu-toolchain-r/test'
+      - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-10 main'
+        key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
     packages:
       - g++
       - libtbb2
@@ -61,8 +63,13 @@ addons:
     update: true
 
 before_install:
-- 
+- >
   if [[ $TRAVIS_OS_NAME == "linux" ]]; then
+    cat /etc/apt/sources.list
+    sudo add-apt-repository universe
+    sudo add-apt-repository multiverse
+    sudo apt-add-repository -y ppa:freecad-maintainers/freecad-daily 
+    sudo apt-get update -qq
     sudo apt-get install -y --no-install-recommends libocct-data-exchange-dev       
   fi