added: dev dependencies to the package.json

Author: GianlucaGuarini

.travis.yml

@@ -6,12 +6,6 @@ branches:
   only:
     - master
 
-before_install:
-  - npm i [email protected]
-  - npm i [email protected]
-  - npm i @gianlucaguarini/[email protected]
-  - npm i [email protected]
-
 before_script:
   - npm run build