Merge pull request #106 from ipfs/doc/readme-circleci

doc(README): use circle-ci badge

README.md

@@ -5,7 +5,7 @@
 [![](https://img.shields.io/badge/freenode-%23ipfs-blue.svg?style=flat-square)](http://webchat.freenode.net/?channels=%23ipfs)
 [![standard-readme compliant](https://img.shields.io/badge/standard--readme-OK-green.svg?style=flat-square)](https://github.com/RichardLitt/standard-readme)
 [![GoDoc](https://godoc.org/github.com/ipfs/go-log?status.svg)](https://godoc.org/github.com/ipfs/go-log)
-[![Build Status](https://travis-ci.org/ipfs/go-log.svg?branch=master)](https://travis-ci.org/ipfs/go-log)
+[![CircleCI](https://img.shields.io/circleci/build/github/ipfs/go-log?style=flat-square)](https://circleci.com/gh/ipfs/go-log)
 
 <!---[![Coverage Status](https://coveralls.io/repos/github/ipfs/go-log/badge.svg?branch=master)](https://coveralls.io/github/ipfs/go-log?branch=master)--->
 

log_level_test.go

@@ -37,11 +37,17 @@ func TestLogLevel(t *testing.T) {
 		}
 	}()
 	logger.Debugw("foo")
-	SetLogLevel(subsystem, "debug")
+	if err := SetLogLevel(subsystem, "debug"); err != nil {
+		t.Error(err)
+	}
 	logger.Debugw("bar")
 	SetAllLoggers(LevelInfo)
 	logger.Debugw("baz")
-	logger.Sync()
-	reader.Close()
+	// ignore the error because
+	// https://github.com/uber-go/zap/issues/880
+	_ = logger.Sync()
+	if err := reader.Close(); err != nil {
+		t.Error(err)
+	}
 	<-done
 }