Fix logger to log level as string instead of int

https://uniplaces.atlassian.net/browse/UN-19798

Lock logrus toml tag

[UN-16629] Lock logrus toml tag #9

Add custom formatter based on env

[RFC][NI] Improve logger (#8)

* Add change to support env

* Add logging for default logger

* Fix typo

* Fix tests

0.5.2

[UN-14538] Fix unexpected stack trace of error

Revert 0.5.0

Revert 0.5.0

Adapt go logger to send missing mandatory fields

[RFC][PL-516] Adapt go logger to send missing mandatory fields #5

Add ability to register default fields

[RFC] Add ability to register default fields (#4)

Add error package support with stack trace handling

[RFC][UN-12293] Add error package support with stack trace handling #3

Add RFC3164 compliance

[RFC][NI] Add RFC3164 compliance #2

Initial release

Initial release