bump easy pkg upgrades; drop Go 1.6 (no httptest.NewRequest)

This fixes a test w request signing due to a content-length:0 header from Go 1.8

.travis.yml

@@ -1,6 +1,5 @@
 language: go
 go:
-  - 1.6.4
   - 1.7.5
   - 1.8
 script:

Godeps

@@ -1,7 +1,7 @@
 github.com/18F/hmacauth                  1.0.1
-github.com/BurntSushi/toml               3883ac1ce943878302255f538fce319d23226223
-github.com/bitly/go-simplejson           3378bdcb5cebedcbf8b5750edee28010f128fe24
-github.com/mreiferson/go-options         33795234b6f327f1be2d78a541893012362a4e06
+github.com/BurntSushi/toml               d94612f9fc140360834f9742158c70b5c5b5535b
+github.com/bitly/go-simplejson           da1a8928f709389522c8023062a3739f3b4af419
+github.com/mreiferson/go-options         77551d20752b54535462404ad9d877ebdb26e53d
 github.com/bmizerany/assert              e17e99893cb6509f428e1728281c2ad60a6b31e3
 gopkg.in/fsnotify.v1                     v1.2.0
 golang.org/x/oauth2                      04e1573abc896e70388bd387a69753c378d46466

oauthproxy_test.go

@@ -599,8 +599,7 @@ type SignatureAuthenticator struct {
 	auth hmacauth.HmacAuth
 }
 
-func (v *SignatureAuthenticator) Authenticate(
-	w http.ResponseWriter, r *http.Request) {
+func (v *SignatureAuthenticator) Authenticate(w http.ResponseWriter, r *http.Request) {
 	result, headerSig, computedSig := v.auth.AuthenticateRequest(r)
 	if result == hmacauth.ResultNoSignature {
 		w.Write([]byte("no signature received"))
@@ -688,10 +687,7 @@ func (st *SignatureTest) MakeRequestWithExpectedKey(method, body, key string) {
 	if body != "" {
 		bodyBuf = ioutil.NopCloser(&fakeNetConn{reqBody: body})
 	}
-	req, err := http.NewRequest(method, "/foo/bar", bodyBuf)
-	if err != nil {
-		panic(err)
-	}
+	req := httptest.NewRequest(method, "/foo/bar", bodyBuf)
 	req.Header = st.header
 
 	state := &providers.SessionState{