Version 1.5.5

New features:

• Prompt for start_confirmation a second time, followed by goodbye message
• Sentry performance monitoring

Bug fixes:

• Send email over TLS, now required by Sendgrid
• Use US-Congress caucus key to match Democrat/Republican (affected Bernie Sanders, Angus King)
• Revert issue with data cache storing None for custom targets

Upgrades:

• replace raven with sentry-sdk