Merge pull request #361 from graphql-go/circleci

ci: replaces travisci with circleci

.circleci/config.yml

@@ -0,0 +1,41 @@
+defaults: &defaults
+  working_directory: /go/src/github.com/graphql-go/graphql
+  steps:
+    - checkout
+    - run: go get -v -t -d ./...
+    - run: go test ./...
+    - run: go vet ./...
+
+version: 2
+jobs:
+  golang:1.8.7:
+    <<: *defaults
+    docker:
+      - image: circleci/golang:1.8.7
+  golang:1.9.7:
+    <<: *defaults
+    docker:
+      - image: circleci/golang:1.9.7
+  golang:latest:
+    <<: *defaults
+    docker:
+      - image: circleci/golang:latest
+  coveralls:
+    working_directory: /go/src/github.com/graphql-go/graphql
+    docker:
+      - image: circleci/golang:latest
+    steps:
+      - checkout
+      - run: go get -v -t -d ./...
+      - run: go get github.com/mattn/goveralls
+      - run: go test -v -cover -race -coverprofile=coverage.out
+      - run: /go/bin/goveralls -coverprofile=coverage.out -service=circle-ci -repotoken $COVERALLS_TOKEN
+
+workflows:
+  version: 2
+  build:
+    jobs:
+      - golang:1.8.7
+      - golang:1.9.7
+      - golang:latest
+      - coveralls

README.md

@@ -1,4 +1,4 @@
-# graphql [![Build Status](https://travis-ci.org/graphql-go/graphql.svg)](https://travis-ci.org/graphql-go/graphql) [![GoDoc](https://godoc.org/graphql.co/graphql?status.svg)](https://godoc.org/github.com/graphql-go/graphql) [![Coverage Status](https://coveralls.io/repos/graphql-go/graphql/badge.svg?branch=master&service=github)](https://coveralls.io/github/graphql-go/graphql?branch=master) [![Join the chat at https://gitter.im/graphql-go/graphql](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/graphql-go/graphql?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+# graphql [![CircleCI](https://circleci.com/gh/graphql-go/graphql/tree/master.svg?style=svg)](https://circleci.com/gh/graphql-go/graphql/tree/master) [![GoDoc](https://godoc.org/graphql.co/graphql?status.svg)](https://godoc.org/github.com/graphql-go/graphql) [![Coverage Status](https://coveralls.io/repos/graphql-go/graphql/badge.svg?branch=master&service=github)](https://coveralls.io/github/graphql-go/graphql?branch=master) [![Join the chat at https://gitter.im/graphql-go/graphql](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/graphql-go/graphql?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 An implementation of GraphQL in Go. Follows the official reference implementation [`graphql-js`](https://github.com/graphql/graphql-js).