chore: enable ip6 tests (#85)

.travis.yml

@@ -8,15 +8,20 @@ stages:
 node_js:
   - '10'
 
-os:
-  - linux
-  - osx
-
 script: npx nyc -s npm run test:node -- --bail
 after_success: npx nyc report --reporter=text-lcov > coverage.lcov && npx codecov
 
 jobs:
   include:
+    - os: linux
+      sudo: false
+      before_script: sudo sh -c 'echo 0 > /proc/sys/net/ipv6/conf/all/disable_ipv6'
+
+    - os: windows
+      cache: false
+
+    - os: osx
+
     - stage: check
       script:
         - npx aegir commitlint --travis

test/node.js

@@ -253,8 +253,7 @@ describe('dial', () => {
     })
   })
 
-  // TODO: https://github.com/libp2p/js-libp2p-websockets/issues/84
-  describe.skip('ip6', () => {
+  describe('ip6', () => {
     let ws
     let listener
     const ma = multiaddr('/ip6/::1/tcp/9091')