update travis config

Author: chandu0101

.travis.yml

@@ -1,26 +1,17 @@
 language: scala
 
 scala:
-- 2.12.1
-- 2.11.8
+- 2.10.6
 
 jdk:
 - oraclejdk8
 
-install:
-  - . $HOME/.nvm/nvm.sh
-  - nvm install stable
-  - nvm use stable
-  - npm install
-
 env:
   global:
     JSENV=node
 
 script:
-  - sbt ++$TRAVIS_SCALA_VERSION test:fastOptJS test:fullOptJS
-  - sbt ++$TRAVIS_SCALA_VERSION 'set parallelExecution in ThisBuild := false' test
-  - sbt ++$TRAVIS_SCALA_VERSION 'set parallelExecution in ThisBuild := false' 'set scalaJSStage in ThisBuild := FullOptStage' test
+  - sbt ++$TRAVIS_SCALA_VERSION test
 
 
 deploy: