Travis: On OSX, only officially support phobos sockets until vibe-core's OSX support improves.

Author: Abscissa

.travis.yml

@@ -283,35 +283,37 @@ matrix:
       env: DB=mariadb-10.4 USE_UNIT_THREADED=true
 
     # on Mac just test latest & oldest supported dmd and ldc
+    # Note, vibe-core isn't fully supported on osx yet (https://github.com/vibe-d/vibe-core/pull/183)
+    # so only test with phobos sockets.
     - d: dmd-2.088.0
       os: osx
       osx_image: xcode11.2 # use OSX 10.14
-      env: DB=mysql-5.6
+      env: DB=mysql-5.6 NO_VIBE=true
 
     - d: dmd-2.080.0
       os: osx
       osx_image: xcode9.4 # use OSX 10.13
-      env: DB=mysql-5.6
+      env: DB=mysql-5.6 NO_VIBE=true
 
     - d: dmd-2.079.1
       os: osx
       osx_image: xcode9.4 # use OSX 10.13
-      env: DB=mysql-5.6
+      env: DB=mysql-5.6 NO_VIBE=true
 
     - d: dmd-2.078.3
       os: osx
       osx_image: xcode9.4 # use OSX 10.13
-      env: DB=mysql-5.6
+      env: DB=mysql-5.6 NO_VIBE=true
 
     - d: ldc-1.9.0
       os: osx
       osx_image: xcode9.4 # use OSX 10.13
-      env: DB=mysql-5.6
+      env: DB=mysql-5.6 NO_VIBE=true
 
     - d: ldc-1.8.0
       os: osx
       osx_image: xcode9.4 # use OSX 10.13
-      env: DB=mysql-5.6
+      env: DB=mysql-5.6 NO_VIBE=true
 
     - d: dmd-2.068.2
       os: osx
@@ -339,6 +341,12 @@ matrix:
       os: osx
       osx_image: xcode11.2 # use OSX 10.14
       env: DB=mysql-latest
+    
+    # Test vibe sockets on OSX. Not yet working. (https://github.com/vibe-d/vibe-core/pull/183)
+    - d: dmd-2.088.0
+      os: osx
+      osx_image: xcode11.2 # use OSX 10.14
+      env: DB=mysql-5.6
 
   allow_failures:
     # Doesn't appear to exist on travis: https://github.com/travis-ci/travis-ci/issues/8849
@@ -380,3 +388,9 @@ matrix:
       os: osx
       osx_image: xcode11.2 # use OSX 10.14
       env: DB=mysql-latest
+
+    # Test vibe sockets on OSX. Not yet working. (https://github.com/vibe-d/vibe-core/pull/183)
+    - d: dmd-2.088.0
+      os: osx
+      osx_image: xcode11.2 # use OSX 10.14
+      env: DB=mysql-5.6