MM-28737: Upgrade dependencies (#15877)

https://mattermost.atlassian.net/browse/MM-28737

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

vendor/github.com/gorilla/schema/.travis.yml

@@ -1,18 +0,0 @@
-language: go
-sudo: false
-
-matrix:
-  include:
-    - go: 1.5
-    - go: 1.6
-    - go: 1.7
-    - go: 1.8
-    - go: tip
-  allow_failures:
-    - go: tip
-
-script:
-  - go get -t -v ./...
-  - diff -u <(echo -n) <(gofmt -d .)
-  - go vet $(go list ./... | grep -v /vendor/)
-  - go test -v -race ./...

vendor/github.com/gorilla/schema/decoder.go

@@ -152,9 +152,15 @@ type fieldWithPrefix struct {
 func isEmptyFields(fields []fieldWithPrefix, src map[string][]string) bool {
 	for _, f := range fields {
 		for _, path := range f.paths(f.prefix) {
-			if !isEmpty(f.typ, src[path]) {
+			v, ok := src[path]
+			if ok && !isEmpty(f.typ, v) {
 				return false
 			}
+			for key := range src {
+				if !isEmpty(f.typ, src[key]) && strings.HasPrefix(key, path) {
+					return false
+				}
+			}
 		}
 	}
 	return true
@@ -182,6 +188,17 @@ func (d *Decoder) decode(v reflect.Value, path string, parts []pathPart, values
 			}
 			v = v.Elem()
 		}
+
+		// alloc embedded structs
+		if v.Type().Kind() == reflect.Struct {
+			for i := 0; i < v.NumField(); i++ {
+				field := v.Field(i)
+				if field.Type().Kind() == reflect.Ptr && field.IsNil() && v.Type().Field(i).Anonymous == true {
+					field.Set(reflect.New(field.Type().Elem()))
+				}
+			}
+		}
+
 		v = v.FieldByName(name)
 	}
 	// Don't even bother for unexported fields.

vendor/github.com/gorilla/schema/encoder.go

@@ -57,6 +57,13 @@ func isZero(v reflect.Value) bool {
 		}
 		return z
 	case reflect.Struct:
+		type zero interface {
+			IsZero() bool
+		}
+		if v.Type().Implements(reflect.TypeOf((*zero)(nil)).Elem()) {
+			iz := v.MethodByName("IsZero").Call([]reflect.Value{})[0]
+			return iz.Interface().(bool)
+		}
 		z := true
 		for i := 0; i < v.NumField(); i++ {
 			z = z && isZero(v.Field(i))