added travis wait before npm install too fix slow command error

>
>
Co-authored-by: Nkmai <[email protected]>
Co-authored-by: lind-tania <[email protected]>
Co-authored-by: rtviner <[email protected]>
Co-authored-by: caitlinchan23 <[email protected]>

Author: rtviner

.travis.yml

@@ -9,6 +9,6 @@ git:
 #   only:
 #   - implementtravisci
 install:
-  - npm install
+  - travis_wait npm install
 script:
   - npm run test