0.3.0

• Always send the newer x-sentry-envelope format, which makes this
  incompatible with older on-premise installations.
• Better document and handle non-ASCII paths. Users on windows should use the
  w version of the appropriate APIs.
• Avoid segfaults due to failed sentry initialization.
• Avoid creating invalid sessions without a release.
• Make sentry_transport_t opaque, and instead expose APIs to configure it.
  More functionality related to creating custom transports will be exposed in
  future versions.

Breaking changes

• The sentry_backend_free function was removed.
• The sentry_backend_t type was removed.
• The sentry_transport_t type is now opaque. Use the following new API to
  create a custom transport.

New API

• sentry_transport_new
• sentry_transport_set_state
• sentry_transport_set_free_func
• sentry_transport_set_startup_func
• sentry_transport_set_shutdown_func

See sentry.h for more documentation.

Deprecations

• sentry_new_function_transport has been deprecated in favor of the new
  transport builder functions.