Update CI

.travis.yml

@@ -8,17 +8,18 @@ language: cpp
 
 matrix:
   include:
-    - os: linux
+    - if: tag IS present
-      dist: xenial
+      - os: linux
-      sudo: required
+        dist: xenial
-      compiler: gcc
+        sudo: required
-      addons:
+        compiler: gcc
-        apt:
+        addons:
-          sources:
+          apt:
-            - ubuntu-toolchain-r-test
+            sources:
-    - os: osx
+              - ubuntu-toolchain-r-test
-      compiler: clang
+      - os: osx
-      osx_image: xcode9.3
+        compiler: clang
+        osx_image: xcode9.3
 
 install:
   - if [[ $TRAVIS_BRANCH != "ci" && $TRAVIS_TAG == "" ]]; then echo "Not branch ci and no tag, cancel build"; fi

appveyor.yml

@@ -11,6 +11,8 @@ environment:
       target: i686-pc-windows-msvc
       qtdir: C:\Qt\5.13.2\msvc2017
       sysdirname: system32
+      
+  skip_non_tags: true
 
 cache:
   CGAL-5.1-Setup.exe -> appveyor.yml