test: add interop tests job in ci (#526)

* chore: interop tests in ci

* chore: address review

* chore: use interop release

.travis.yml

@@ -39,5 +39,12 @@ jobs:
       script:
         - npx aegir test -t browser -t webworker -- --browsers FirefoxHeadless
 
+    - stage: test
+      name: interop
+      script:
+        - cd node_modules/interop-libp2p
+        - npm install
+        - LIBP2P_JS=${TRAVIS_BUILD_DIR}/src/index.js npx aegir test -t node --bail
+
 notifications:
   email: false

package.json

@@ -86,6 +86,7 @@
     "it-concat": "^1.0.0",
     "it-pair": "^1.0.0",
     "it-pushable": "^1.4.0",
+    "interop-libp2p": "~0.0.1",
     "libp2p-bootstrap": "^0.10.3",
     "libp2p-delegated-content-routing": "^0.4.1",
     "libp2p-delegated-peer-routing": "^0.4.0",