feat: upgrade Go dependencies, support Go 1.17+

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: 1.16
+          go-version: 1.17
 
       - uses: actions/checkout@v2
       - name: Run Unit tests

go.mod

@@ -1,8 +1,15 @@
 module github.com/casdoor/casdoor-go-sdk
 
-go 1.16
+go 1.17
 
 require (
-	github.com/golang-jwt/jwt/v4 v4.1.0
-	golang.org/x/oauth2 v0.0.0-20210514164344-f6687ab2804c
+	github.com/golang-jwt/jwt/v4 v4.5.0
+	golang.org/x/oauth2 v0.13.0
+)
+
+require (
+	github.com/golang/protobuf v1.5.3 // indirect
+	golang.org/x/net v0.16.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
 )