Bump version for 10.3.7

Merge pull request jellyfin#1514 from Bond-009/httpclient2

Fix issues with HttpClientManager

Bump version for 10.3.5

Bump version for 10.3.4

Bump version for 10.3.3

Bump version for 10.3.2

Update submodule for 10.3.1

Bump version to 10.3.0 (release)

Bump version to 10.3.0-rc2 and update submodule

Bump version to 10.3.0 and update submodule