initial attempt

.travis.yml

@@ -1,17 +1,15 @@
 language: java
 matrix:
   include:
-    - os: windows
+    - os: osx
       language: bash
-      before_script:
-        - choco install adoptopenjdk11
-        - export JAVA_HOME="$(dirname "$(dirname "$(find "/c/Program Files/AdoptOpenJDK" -name javac.exe)")")"
-      # no site gen on windows
-      script: ./mvnw -B -e verify
+      # for jdk 11.0.1+13
+      osx_image: xcode10.1
     - os: linux
       dist: trusty
       language: java
       jdk: openjdk8
+      script: ./mvnw -B -e verify site site:stage
       after_success:
         - ./mvnw -B -Pcoverage clean verify coveralls:report
     - os: linux
@@ -26,8 +24,13 @@ matrix:
       dist: trusty
       language: java
       jdk: oraclejdk11
+    - os: windows
+      language: bash
+      before_script:
+        - choco install adoptopenjdk11
+        - export JAVA_HOME="$(dirname "$(dirname "$(find "/c/Program Files/AdoptOpenJDK" -name javac.exe)")")"
 script:
-  - ./mvnw -B -e verify site site:stage
+  - ./mvnw -B -e verify
 cache:
   directories:
     - $HOME/.m2