Improve pubsub error handling by adding message ACK id

Makes it easier to manually ack the messages.

improve pubsub plugin logging (#44)

* improve pubsub plugin logging

logs the messages data separately to make sure it is not truncated
and add exception information to the log.

* add more exception logging

* print test output to see log behaviour

* bump version 4.2.0

Co-authored-by: Fredrik Gustafsson <fredrikg@spotify.com>

fixing detectify schema (#37)

Co-authored-by: Attila Dulovics <attilad@spotify.com>
Co-authored-by: mspringare <mspringare@gmail.com>
Co-authored-by: dulovics <31633715+dulovics@users.noreply.github.com>

Added Github Action workflow script (#39)

* Added Github Action workflow script

* Documented python 3.9 support and bumped the version for the release

* Removed the Travis CI definition

* Updated the trigger events definition

* Fixed the tpyo error for the os definition

Co-authored-by: Attila Dulovics <attilad@spotify.com>

Update setup.py (#35)

Update detectify schema (#33)

* sort detectify schema

* sort fields

* remove default required=False parameters

* add new field and subschemas

* revert class sorting

* bump version

* Update comet_parser_detectify.py

allow null values for domain_token field

* Update comet_parser_detectify.py

add details and owasp fields (in payload) schemas

* Update comet_parser_detectify.py

typo

add fields to detectify schema (#32)

* add fields to detectify schema

* remove debugging prints

* bump version

bump marshmallow (#31)

bump marshmallow deps and update code as needed

Bump dependencies and version (#27)

Bump the pinned dependencies and bump the package version since the
google-cloud-pubsub bump will make it (in)compatible with other Google
packages.

Remove the pinning of dev-dependencies since it is not that necessary
for a library (and they are very seldom bumped anyway).

Change the dependency of comet-core to make releases easier.

Update dependencies to use any 2.x version of comet-core (#22)