update for NS5+

Author: PeterStaev

.travis.yml

@@ -47,8 +47,8 @@ matrix:
       os: osx
       env: 
         - iOS="10.3"
-        - Xcode="8.3"
-      osx_image: xcode8.3
+        - Xcode="9.4"
+      osx_image: xcode9.4
       language: node_js 
       node_js: "8"
       jdk: oraclejdk8
@@ -72,9 +72,9 @@ matrix:
       os: osx
       env: 
         - iOS="10.3"
-        - Xcode="8.3"
+        - Xcode="9.4"
         - Platform="iOS"
-      osx_image: xcode8.3
+      osx_image: xcode9.4
       language: node_js 
       node_js: "8"
       jdk: oraclejdk8