.travis.yml quick fixes

- skip some platform versions for now
- mark FUTURE TBD platform versions

.travis.yml

@@ -19,10 +19,11 @@ matrix:
     os: linux
     language: node_js
     node_js: '4.2'
-  - env: PLATFORM=browser-safari
-    os: linux
-    language: node_js
-    node_js: '4.2'
+  # TBD SKIP for now:
+  # - env: PLATFORM=browser-safari
+  #   os: linux
+  #   language: node_js
+  #   node_js: '4.2'
   - env: PLATFORM=browser-edge
     os: linux
     language: node_js
@@ -32,11 +33,15 @@ matrix:
     osx_image: xcode7.3
     language: node_js
     node_js: '4.2'
-  - env: PLATFORM=ios-10.0
-    os: osx
-    osx_image: xcode7.3
-    language: node_js
-    node_js: '4.2'
+  # TBD SKIP for now:
+  # - env: PLATFORM=ios-10.0
+  #   os: osx
+  #   osx_image: xcode7.3
+  #   language: node_js
+  #   node_js: '4.2'
+  # FUTURE TBD:
+  # - env: PLATFORM=ios-11.4
+  #   ...
   - env: PLATFORM=android-4.4
     os: linux
     language: android
@@ -47,16 +52,17 @@ matrix:
       - platform-tools
       - tools
       - build-tools-26.0.2
-  - env: PLATFORM=android-5.1
-    os: linux
-    language: android
-    jdk: oraclejdk8
-    android:
-      components:
-      - tools
-      - platform-tools
-      - tools
-      - build-tools-26.0.2
+  # TBD SKIP for now:
+  # - env: PLATFORM=android-5.1
+  #   os: linux
+  #   language: android
+  #   jdk: oraclejdk8
+  #   android:
+  #     components:
+  #     - tools
+  #     - platform-tools
+  #     - tools
+  #     - build-tools-26.0.2
   - env: PLATFORM=android-6.0
     os: linux
     language: android
@@ -67,16 +73,20 @@ matrix:
       - platform-tools
       - tools
       - build-tools-26.0.2
-  - env: PLATFORM=android-7.0
-    os: linux
-    language: android
-    jdk: oraclejdk8
-    android:
-      components:
-      - tools
-      - platform-tools
-      - tools
-      - build-tools-26.0.2
+  # TBD SKIP for now:
+  # - env: PLATFORM=android-7.0
+  #   os: linux
+  #   language: android
+  #   jdk: oraclejdk8
+  #   android:
+  #     components:
+  #     - tools
+  #     - platform-tools
+  #     - tools
+  #     - build-tools-26.0.2
+  # FUTURE TBD:
+  # - env: PLATFORM=android-8.?
+  #   ...
 
 before_install:
 - rm -rf ~/.nvm && git clone https://github.com/creationix/nvm.git ~/.nvm && (cd ~/.nvm