remove node 4

Tap doesn't work well on node 4 windows, and it's past LTS.
npm · Oct 18, 2018 · 6086e5a · 6086e5a
1 parent a462bec
commit 6086e5a
Showing 1 changed file with 1 addition and 2 deletions.
diff --git a/.travis.yml b/.travis.yml
@@ -4,7 +4,6 @@ node_js:
   - 10
   - 8
   - 6
-  - 4
 
 os:
   - linux
@@ -15,4 +14,4 @@ cache:
     - $HOME/.npm
 
 notifications:
-  email: false
+  email: false