chore(composer): fix typ

chore(version): release v1.8.1

chore(version): release v1.8.0

Bump version to v1.7.5

Bump version number to v1.7.4

Drop support for hhvm-nightly since it's not supporting PHP as of 12/…

…3/2018

rollbar#424: match MAX_PAYLOAD_SIZE with the latest documentation

Bump version to 1.7.1

Bump notifier version to v1.7.0

Bump version to v1.6.3