circle: test docker and update golang

License: MIT
Signed-off-by: Steven Allen <steven@stebalien.com>

.circleci/config.yml

@@ -22,7 +22,6 @@ defaults: &defaults
   working_directory: ~/ipfs/go-ipfs
   environment:
     GO111MODULE: "on"
-    TEST_NO_DOCKER: 1
     TEST_NO_FUSE: 1
     GOPATH: /home/circleci/go
     CIRCLE_TEST_REPORTS: /tmp/circleci-test-results
@@ -33,7 +32,7 @@ defaults: &defaults
     TRAVIS: 1
 
   docker:
-    - image: circleci/golang:1.11
+    - image: circleci/golang:1.12.1
 
 jobs:
   gotest: