Upgrading node versions and Adding ppc64le architecture support on travis-ci

Author: kishorkunal-raj

.travis.yml

@@ -1,14 +1,30 @@
 sudo: false
 language: node_js
 node_js:
-  - "0.11"
-  - "0.12"
   - "4"
   - "5"
+  - "6"
+  - "7"
+  - "8"
+  - "9"
+  - "10"
 matrix:
   include:
     - node_js: "4"
       env: TEST_SUITE=lint
+    - node_js: "5"
+      arch: ppc64le
+    - node_js: "6"
+      arch: ppc64le
+    - node_js: "7"
+      arch: ppc64le
+    - node_js: "8"
+      arch: ppc64le
+    - node_js: "9"
+      arch: ppc64le
+    - node_js: "10"
+      arch: ppc64le
+
 env:
   - TEST_SUITE=unit
 script: npm run-script $TEST_SUITE