Release v1.10.4 (amazon-ion#567)

Prepare v1.10.3 release (amazon-ion#563)

Prepare v1.10.2 release

Prepare v1.10.1 release (amazon-ion#532)

Prepare v1.10.0 release

Prepares version 1.9.6 for release. (amazon-ion#479)

Prepares version 1.9.5 for release.

Prepares version 1.9.4 for release.

Release 1.9.3 (amazon-ion#423)

Bumps version to 1.9.2 (amazon-ion#417)

This is directly based on 1.9.0 due to amazon-ion#416.  It effectively reverts
the 1.9.1 release.