Updating nodejs env for traivis CI

Author: muthurathinam-m

.travis.yml

@@ -3,12 +3,12 @@ node_js:
   - "node"
   - "lts/*"
   - "10.15.1"
-  - "10.0"
-  - "9.11"
-  - "9.0"
-  - "8.15"
-  - "8.0"
-  - "7.10"
-  - "7.0"
-  - "6.9"
-  - "6.0"
+  - "10.0.0"
+  - "9.11.2"
+  - "9.0.0"
+  - "8.15.0"
+  - "8.0.0"
+  - "7.10.1"
+  - "7.0.0"
+  - "6.16.0"
+  - "6.0.0"