Merge pull request nolar#563 from nolar/py39-for-kopf027-with-pypi

Fix the old PyPI credentials to release 0.27.1 (for Python 3.9 support)

Merge pull request nolar#559 from nolar/no-warnings-on-patching-unexi…

…stent-objects

Hide warnings on fake inconsistencies when patching the nonexistent objects

Merge pull request nolar#558 from nolar/log-responses

Enrich the K8s API errors with information from K8s API itself

Merge pull request nolar#557 from nolar/purge-lost-handlers

Purge the handlers' states even if the handlers are filtered out

Merge pull request nolar#549 from nolar/lgmt-fixes

Fix LGTM warnings

Merge pull request nolar#547 from nolar/travis-cron-lost

Re-enable nightly builds in Travis (improper condition?)

Merge pull request nolar#364 from nolar/doc-preserve-arbitrary-fields

Document the preservation of Kopf's persistence state in "v1" CRDs

Merge pull request nolar#364 from nolar/doc-preserve-arbitrary-fields

Document the preservation of Kopf's persistence state in "v1" CRDs

Merge pull request nolar#353 from nolar/annotations-charsets

Force annotations to end strictly with alphanumeric characters

Merge pull request nolar#346 from nolar/limited-annotations

Limit persistence annotations to 63 chars