chore: version bump

Author: gotev

manifest.gradle

@@ -9,8 +9,8 @@ ext {
  library_licenses = ["Apache-2.0"]
  library_licenses_url = 'https://www.apache.org/licenses/LICENSE-2.0.txt'
  library_project_group = 'net.gotev'
- library_version = '4.9.1'
- version_code = 50
+ library_version = '4.9.2'
+ version_code = 51
  min_sdk = 21
  target_sdk = 34
  demo_app_id = 'net.gotev.uploadservicedemo'