Bump github.com/mattermost/mattermost-server/v6 from 6.1.0 to 6.3.0 (#1686)

Bumps [github.com/mattermost/mattermost-server/v6](https://github.com/mattermost/mattermost-server) from 6.1.0 to 6.3.0.
- [Release notes](https://github.com/mattermost/mattermost-server/releases)
- [Changelog](https://github.com/mattermost/mattermost-server/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mattermost/mattermost-server/compare/v6.1.0...v6.3.0)

---
updated-dependencies:
- dependency-name: github.com/mattermost/mattermost-server/v6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

vendor/github.com/mattermost/mattermost-server/v6/model/utils.go

@@ -98,6 +98,43 @@ func (sa *StringArray) Scan(value interface{}) error {
 	return errors.New("received value is neither a byte slice nor string")
 }
 
+// Scan converts database column value to StringMap
+func (m *StringMap) Scan(value interface{}) error {
+	if value == nil {
+		return nil
+	}
+
+	buf, ok := value.([]byte)
+	if ok {
+		return json.Unmarshal(buf, m)
+	}
+
+	str, ok := value.(string)
+	if ok {
+		return json.Unmarshal([]byte(str), m)
+	}
+
+	return errors.New("received value is neither a byte slice nor string")
+}
+
+func (si *StringInterface) Scan(value interface{}) error {
+	if value == nil {
+		return nil
+	}
+
+	buf, ok := value.([]byte)
+	if ok {
+		return json.Unmarshal(buf, si)
+	}
+
+	str, ok := value.(string)
+	if ok {
+		return json.Unmarshal([]byte(str), si)
+	}
+
+	return errors.New("received value is neither a byte slice nor string")
+}
+
 var translateFunc i18n.TranslateFunc
 var translateFuncOnce sync.Once