change CI to target go-ipfs branch

Author: aschmahmann

.travis.yml

@@ -18,10 +18,11 @@ env:
     - BUILD_DEPTYPE=gomod
 
 before_install:
-  - docker pull ipfs/go-ipfs:master
+  - cd /tmp && go install github.com/ipfs/go-ipfs/cmd/ipfs@aba543fc5e6acf3859d8dca28bfb49941be30624
   - mkdir /tmp/ipfs && chmod 0777 /tmp/ipfs
-  - docker run -d -v /tmp/ipfs:/data/ipfs -p 8080:8080 -p 4001:4001 -p 5001:5001 ipfs/go-ipfs:master "daemon" "--enable-namesys-pubsub"
-  
+  - ipfs init
+  - (ipfs daemon --enable-namesys-pubsub &)
+
 install:
   - go mod download