bump version to 0.53.1 (microsoft#574)

bump version to 0.53.0 (microsoft#557)

Update signjars-nightly.yml for Azure Pipelines

Update signjars-rc.yml for Azure Pipelines

Bump version to 0.51.0 (microsoft#533)

Bump version to 0.50.0 (microsoft#516)

bump version to 0.49.0 (microsoft#506)

Bump version to 0.48.0 (microsoft#502)

Bump version to 0.47.0 (microsoft#497)

Bump version to 0.46.0 (microsoft#492)