Update JWT lib to v3

Signed-off-by: Vishal Rana <vr@labstack.com>

glide.lock

@@ -1,12 +1,12 @@
 hash: 21820434709470e49c64df0f854d3352088ca664d193e29bc6cd434518c27a7c
-updated: 2016-06-11T08:07:31.375646661-07:00
+updated: 2016-06-16T14:30:17.695241955-07:00
 imports:
 - name: github.com/davecgh/go-spew
   version: 5215b55f46b2b919f50a1df0eaa5886afe4e3b3d
   subpackages:
   - spew
 - name: github.com/dgrijalva/jwt-go
-  version: c04502f106d7c5b3fae17c5da49a1bbdd3006b3c
+  version: d2709f9f1f31ebcda9651b03077758c1f3a0018c
 - name: github.com/klauspost/compress
   version: 14eb9c4951195779ecfbec34431a976de7335b0a
   subpackages:
@@ -32,22 +32,22 @@ imports:
   subpackages:
   - difflib
 - name: github.com/stretchr/testify
-  version: 8d64eb7173c7753d6419fd4a9caf057398611364
+  version: d77da356e56a7428ad25149ca77381849a6a5232
   subpackages:
   - assert
 - name: github.com/valyala/fasthttp
-  version: 8db7d05839b5f4d21d5da1fcb3897d294ff6fd9f
+  version: 83a24c301bb683e450cd0304a3eb69556c48678c
   subpackages:
   - fasthttputil
 - name: github.com/valyala/fasttemplate
   version: 3b874956e03f1636d171bda64b130f9135f42cff
 - name: golang.org/x/net
-  version: 3f122ce3dbbe488b7e6a8bdb26f41edec852a40b
+  version: d7bf3545bb0dacf009c535b3d3fbf53ac0a339ab
   subpackages:
   - context
   - websocket
 - name: golang.org/x/sys
-  version: 7f918dd405547ecb864d14a8ecbbfe205b5f930f
+  version: 62bee037599929a6e9146f29d10dd5208c43507d
   subpackages:
   - unix
 devImports: []

middleware/jwt_test.go

@@ -45,7 +45,8 @@ func TestJWT(t *testing.T) {
 	h = JWT([]byte("secret"))(handler)
 	if assert.NoError(t, h(c)) {
 		user := c.Get("user").(*jwt.Token)
-		assert.Equal(t, user.Claims["name"], "John Doe")
+		claims := user.Claims.(jwt.MapClaims)
+		assert.Equal(t, claims["name"], "John Doe")
 	}
 
 	// Invalid Authorization header