Update circle.yml

Author: Gunasekar-K

circle.yml

@@ -9,6 +9,8 @@ dependencies:
     - sudo add-apt-repository ppa:ubuntu-toolchain-r/test  -y
     - sudo apt-get update -y
     - sudo apt-get install g++-4.8  -y
+  override:
+    - npm install
 
 compile:
   override: