Downgrade NPM

Bruno Herfst · Bruno Herfst · commit b1d7c9992f91 · 2018-04-08T21:19:45.000+10:00
diff --git a/.travis.yml b/.travis.yml
@@ -8,7 +8,7 @@ notifications:
 node_js:
   - '6'
 before_install:
-  - npm i -g npm@^6.0.0
+  - npm i -g npm@^5.6.0
 before_script:
   - npm prune
 script:
